That sounds like a recipe for an incredibly toxic environment. Not only are you hired for a specific pigeonhole, you are expressly forbidden from progressing through it: at least in some sane companies promotion is preceded by already having done the new role for a time and the title jump merely formalises the situation.

In fact, I thought the pigeonhole hiring in traditional finance was bad enough. You just managed to outdo decades of dysfunction in one try.

The last thing we need in tech is a codified caste system.