I’m really not sure what you’re arguing. You want a precise test for being a good PM, that can be marked like an examination with correct and incorrect answers? It’s not engineering - it’s a role largely to do with learning and measuring and facilitating streams of work across multiple different (highly opinionated!) types of professionals - user researchers, engineers, designers, marketers, copywriters, data scientists - all of whose expertise is needed to ensure good outcomes. The fact that it can’t be measured as a multiple choice test doesn’t mean it isn’t skill. But if you really want to go down that route, then you’d ask a PM to explain some ways of proving the value of a potential feature, or the different ways to prioritise a roadmap, or how to manage challenging stakeholders, or indeed how to get good outcomes from colleagues who insist that only they are the people with any kind of skill…

Don’t worry, PMs are also used to working with engineers who view their profession as the only special one. Managing that is part of how to get good outcomes.

If you’ve mainly encountered bad PMs, then hey I’m sorry for you. Find somewhere to work with better colleagues?

But you’ll not convince me that one profession is just inherently better than another. That’s silly, and speaks to a lack of empathy that is, if you’re still looking for a checkbox test for the role, the type of thing that would cause you to fail it immediately.