Jeremy Gorr lists 50 things a business analyst can delegate. It is a lot. I came across this post and wondered: Product managers can delegate almost all of these things as well!
I just suppose that many product managers and not in a position to delegate anything because there is nobody to delegate to. Product managers often manage products, not people. There are no assisting teams of “PM assistants”. So after all, the product manager would wish to delegate but then do all these things himself anyway.