Numbers need to be adjusted. If we take warband as example you would eventually reach soft EXP cap, but not before you could lvl at least one attribute to the max and with it 6 associated skills and than splash the rest.
So similarry Bannerlord has soft cap as well, the problem is, even if you focus on skills, the soft cap doesn't go away because of curve quickly adds up and after skill is over 100 it slows significatnly even with all the focus points and attributes put into it.
I can see that in my game that at skill 100 it needs 12K EXP to improve. I would argue that this should be close to the cealing for needed EXP to improve the skill, and than soft cap comes into play in form of "Learning Limit" anyway.
I think devs were a bit cautius because they introduced few strong perks that give bonuses for every skill level after 250, like Ultimate Leader in Leadership tree. But than I would just nerf those perks a bit.