Overdeveloped traps decrease optical/perceived shoulder width.
A lot of guys’ egos lead to them obsessing with traps because they grow so easily for most folks, and when you’re training for size, growth is the ultimate reward & you’ll take whatever you can get.
Big traps on narrow shoulders aren’t very aesthetically pleasing to look at.
As far as “overpowering” muscles that are okay, I’ve never seen a set of calves on anyone – male or female – and thought, “man those look stupid.”