This extends into life as well. I play golf (for fun [2]), which cunningly has a scoring system that tells me I'm objectively rubbish, and getting (mostly) worse.

I've found this professionally useful in combating the seductive idea that "because I'm -really- good at one thing, I'm good at everything. "

I've seen the opposite in customers sometimes. Doctors who are very good doctors, have strong feelings about UI (that are objectively just wrong[1].) But because they operate in a culture which treats their word as law, they find it hard to accept that others may have skills in other areas they lack.

If you are an expert in something I recommend including something else in your life to keep you humble. That humility allows you to be a better spouse, parent, and human being. (And ironically a better expert who's able to recognise and adopt an idea or solution that'd better than yours even in your area of expertise.)

We choose to do these these things, not because they are easy, but because they are hard.

[1] think yellow comic sans italic text on blue background levels of wrong.

[2] golf is fun precisely because it is hard. Things that are easy are not fun. The pleasure of 1 perfect shot out of 100 tries is the dopamine that keeps us coming back.

I was always told that at the next level of school, I would finally meet a challenge. I got through a master's degree without its happening, and unfortunately that just drove the initial point deeper, that I was somehow fundamentally different from other people rather than just very luckily in an environment exceptionally well-suited to my aptitude (even though the rest of the world is not).