It can be a bit of a double edged sword, especially in startups.

I've been on the leadership side of this where you suddenly realize it's vitally important to your growth that you can give away the things you're doing day to day - unblocking people when they get stuck has a higher ROI than doing it yourself even if you'd do it better/faster because it scales more.

But I saw this very differently at an early stage company where our being successful led to people being hired to do all the interesting areas I had been growing into - if someone has Legos anxiety it may very well be because they've realized that this growth is not going to work well for them.