I agree with you in principle that's the correct attitude. However I don't think the comparison to the music industry is necessarily correct.
A lot of managers in tech got there because they are technically strong. We can argue about whether that's correct or not but I think that's typically the case. People who perform well as engineers are the ones who are given leadership opportunities. People who do not are not.
So first challenge is given you were maybe one of the smarter hires, of some smart people that tried to hire people smarter than themselves (let's assume), how do you hire people smarter than yourself? at scale?
Where we end up typically in successful tech companies is with some degree of a mix of trying to make "folks at the pointy end successful" and some degree of "telling the folks at the pointy end what to do". Usually managers and directors are very strong technically and quite sharp, though more distant from the actual work because they don't do it any more. The precise mix depends on culture and circumstances but it's almost never this ideal environment of servant leaders surrounded by immense talent and just facilitating that talent doing great things.
I've been in places that are very close to the "good" end of this spectrum and there's still going to be some pause in giving feedback to leadership that they've done something wrong. Maybe you have a great relationship with your lieutenants where they can be openly critical of you and you reinforce that. I think that's highly unusual in a social environment. It's a lot more likely there are certain things they won't share with you because they estimate the damage to the relationship is larger than the utility of being open.
EDIT: I misread your statement about hiring people smarter than yourself, so I think we agree there. The problem is still that if you're the smartest person there's a bit of tension between that and creating conditions for the people under you to be successful. Btw, I still think you should try and hire people smarter than yourself ;) it's just hard to impossible to scale that - as you point out.