100% what others are saying. This is a hot take rant with bad arguments based on an experience with a bad product manager (or maybe you're just difficult to work with and your ideas aren't as innovative or as good as you think).

I can easily flip the script and say "Devs at B2B shouldn't be anything more than oompah-loompahs" or "UI designers shouldn't be allowed to give ideas" based on a couple of my own isolated experiences.

You want to be taken seriously? Don't rant and explain what structure/methods would be more appropriate for a B2B business that would balance the need for innovation that makes users happy with keeping the paying gatekeepers willing to keep paying