> A good UXer should be a guide.

agreed

> UX has long been in the role of guiding business towards the right direction. That some people can’t do that isn’t a limit of their environment, it’s a limit of their skillset.

I cannot follow the reasoning, I am afraid.
Surely, only those who let themselves be guided, can be.
For many of the reasons that have been proposed by other answers, many companies are not very good at letting themselves be guided by designers. Leadership and action are simply not afforded to them.

It’s a very singular position that anyone who is being ignored is being ignored because of their own fault! I am sure you will find endless counterexamples, if you look at the world for a minute.