Growth mindset is just replying to yourself with “skill issue” every time something goes wrong
Every skill issue is a belief issue
Growth Mindset vs Fixed Mindset — “Those with a ‘fixed mindset’ believe that abilities are mostly innate and interpret failure as the lack of necessary basic abilities, while those with a ‘growth mindset’ believe that they can acquire any given ability provided they invest effort or study.”
medium.com • Mental Models I Find Repeatedly Useful – Medium
Even in the growth mindset, failure can be a painful experience. But it doesn’t define you. It’s a problem to be faced, dealt with, and learned from.
Carol S. Dweck • Mindset: The New Psychology of Success

In short, when people believe in fixed traits, they are always in danger of being measured by a failure. It can define them in a permanent way. Smart or talented as they may be, this mindset seems to rob them of their coping resources.