No, you have a naive understanding of how the world and language works.You do not get the point
(Edit to make this less harsh: I understand where you're coming from, and I sympathize with your stance. It would make many things a lot easier if things were as well structured as you suggest, but that's simply not the reality. Everything is immensely complicated and chaotic, including most of science.)
Terminology is no less subject to change from outside a field going in, as it is from inside a field itself. And there is NEVER complete uniformity in acceptance or usage of a term even within a field. There are no absolute rules as to what can or can not be done in arbitrary systems. There simply is no central authority that can dictate anything in science. You can make your argument why something should be called X, and if enough of your peers accept the usage it can be a new standard. But even a new standard is subject to change.
Also, you're a senior engineer. Why should I listen to you in regards to game development terminology? We are talking about terminology here, the meaning of these words do not change unless through the respective discipline. Unless the all knowing council of game developers redefines what beta means in their field, it can never be redefined.
Not responding to any of the analogies presented and cherry-picking one example that you think works (electron) doesn't really address anything. I instantly thought of a software framework, developed and maintained by github, but then I realized you were talking about the bird.
If anyone had any interest in using "metacarpal bones" in a different context, and that context spread like a wildfire, a doctor would have no other choice than to accept that the new context is just as valid. I also wasn't aware than engineering came with an in-depth knowledge of linguistics. I don't know what they do in your country, but at least in mine it's not even remotely related.By the way, you are debating a senior engineer about engineering terminology. Do you this with doctors as well? Or just us? Like, do you go to a doctor and say "nah, this is what we call metacarpal bones today; catch up doc, language evolves!"
Look, you can be disappointed with the product all you want. You can also be slightly annoyed that they're apparently misusing a term that's dear to your heart. But the real issue is that the game isn't up to your standards as a whole, regardless of whether anyone calls what they're doing right now a beta or a banana. If it were up to your standards in every other way imaginable and they called it a beta, despite critical functionality failures on other machines, or one of the multitudes of versions during the banana testing phase, you most likely wouldn't demand that people "should shame the developers".You would not, but we give gaming companies a pass in this and they almost never fail to disappoint in the end.