I actually agree with you on the first part. The responsibility for decisions ultimately falls on government, but of course they don't want to be blamed if things go wrong so they hide behind the Science(TM) to justify them and shift responsibility. Science advises on what seems to be the best way to go, with different degrees of confidence (which are routinely ignored by whoever is in charge, I can tell you this by experience on unrelated matters).The senators are good men, but the Senate is a vicious beast. And many doctors of theology and priests were quite open-minded, well-meaning people who discussed the finer points of Tomist metaphysics as crazed crowds burned through things and people in the streets below them, because God willed so.
My problem is not with science itself, but how it is presented by - yes, often but not only by non-scientits like journalists or politicians - and the implied technocracy. That politics is reduced tomommyscientists knows best and the matter is settled. Dissent is unscientific and thus unacceptable. This kind of political scientism is fundamentally undemocratic, illiberal and whatever the opposite of humanistic is.
A microbiologist or and epidemiologist may be the most qualified to answer what covid is and how it spreads etc, but they are not uniquely qualified to determine what political action ought to be taken. A doctor may be qualified to tell you your arteries are clogged and the way to undo it is diet and exercise, but he shouldn't have the right to make you do that. You still have your moral and legal autonomy and you decide. Yes, technically the restrictions were enacted by political bodies, but they did so by just blindly appealing to the scientific authority. Though formally decided by political bodies, the idea that there is only one possible course of action - the one suggested and sanctioned by science - was widely spread and inserted into people's heads.
And this is still the best case scenario where
1) you have the faith and trust that the scientists truly gave their best effort, good faith opinion, which is a huge leap of faith, especially when untold amounts of money and power are involved. sure, there is probably zero corrupting pressure, or outright bribery, blackmail or any combination on a scientist researching how often a ladybug ****s.
2) the most qualified opinion is actually pretty qualified. This too is often not the case. Suppose there is a group of preteens. All but one are old order Amish and one is a "normal" kid. In this group, the normal kid is clearly the most qualified to drive a car. He's never driven one, he doesn't really understand ho a combustion engine works, but he understands the basic idea that you have to put the key in the starter, that the pedals are somehow involved. But I'm still not getting in that car, if he's driving.
My comment on the rest would be that if your last analogy is meant to represent decisions taken on covid you are kind of missing an element there. There is a concrete danger coming after the group, and the car is the only way out (and I can't think of something to put in there because there isn't really anything that comes to mind that would match the way covid works). Also the distinction between Amish and "normal" was a little cringe .
Science in general is based on an honor system. There are of course people who go against that and follow their self interest, but that applies to every profession. Following your line of thought we should stop listening to anything other categories say (police for example?). I would argue that that leads to anarchy. But maybe that's not what you are actually proposing and you just come off strong because of your frustration on the topic (which is honestly understandable).
Also, if you actually listen to the science that means that you talk to multiple people to try and get a feeling for what the community thinks, not just one individual. If you see multiple high profile scientists saying different things then there's probably not a consensus on the thing they talking about. And a good researcher will actually tell you when they are not sure about something (in fact it is rare to see someone put something in absolute certain terms, just read any medical scientific paper).
Of course that requires a more complicated and nuanced approach to science. So politicians don't do it, just like journalists don't do it. I would argue that that places the blame on them, not the scientific community.
That said, researchers definitely should be better at communicating, and many of them tried during covid who really should have spent that time working in their lab. But it's not like they don't know that they suck at it. They are doing what they can, it's not their job (although many are starting to realize that in this day and age it kind of is).
Journalists on the other hand should definitely know better, and they should make sure that they have things right instead of just publishing whatever gets them those sweet clicks.