The problem is, some cannot believe that high performers, can be experts in multiple branches of a field.

Their development slows to a crawl, as they get stuck in one role. Yours, and others like you, just keep that intense growth happening.

It isn't necessarily their fault, either. Circumstances can keep someone slotted deep in a role, with no way to expand laterally.

So, they may literally think such breadth and depth of experience is just overstatement.

The other aspect is organizational appetite for risk.

The first company I worked for let anyone grow into any role they proved they could do. If you solved the hard problems you were the senior developer, if you took the reigns you were quickly promoted to lead/manager. Seniority didn't count for anything and roles were very fluid.

That's an uncommon situation and what I've learned is it's hard to imagine if you've spent a career in more traditional organizations.

Right, yes, this too.

I recall a contract with a government department. Very much like this. And the very lengthy discussion about the simplest things.