[Feathercrown]

Isn't the Peter Principle only true if you consider skillsets to be static? If you learn and grow into new roles, it can be avoided or mitigated.

[chasd00]

i tell my kids, "get good at learning and you don't have to get good at any anything else".

[TheGRS]

I'd agree personally. My secret is that I've always considered myself incompetent, but I also have a growth mindset to improve, and so far its worked out for me. But I do meet people often who have a static mindset even in very skilled fields. Some air of "I did all my learning already, now its time to work, I deserve this position because I already did all that learning."