And that's why you have an in-house support departments whose job is to solve these issues. It's like buying a tractor, then relying on the company several towns away to provide repairs.
Customizability is good. Because when I settled in a workflow, I don't want to see things I don't want occupying space or distracting me. It's like not using part of the desk because you're supposed to have piles of books in this place.
I'm not advocating to have trillion of options a la VIM. But anything except the core purpose of the software should be customizable in some way, including the options to hide it.