I still kinda disagree. We're talking here about engineering role after all. I have a colleague who is a code wizard, but has kinda problem with (under)communicating. He's still widely respected as a very good engineer, people know his communication style and adapt to it.

But if you're a mediocre problem solver, you can't really make up for it with communication skills. That kinda moves you into non-engineering role like PO, SM or perhaps support engineer.

But I would say this - once you reach a certain high level of competence, then the communication skills, leadership, ownership can become the real differentiating factors. But you can't really get there without the high level of competence first.