I check for well-designed looking ones first though, if it's not extremely custom (like the razor holder I designed to fit my specific razor over the side of my specific mug-like bathroom holder thing).

I found a nice looking bracket shaped specifically for my Bamix stick blender that someone else had designed, saved me some trial and error and time and filament.

I found someone else's design for a Makita LXT battery fitting that I used as the base to prototype the inverse: I wanted a dummy battery shape that I could mount to the wall in order to hang my vacuum cleaner from it.

I'm glad I can do some basic CAD / am willing to learn, but I've definitely got some use out of it with only a slicer. And then there are the people who only want trinkets anyway.