Even when I understand, copypasting is often faster and skipping or removing the $ is slightly annoying.

My favorite are the ones where the command is in a width limited element that needs to scroll so you can't see the full command to evaluate if you want to copy it or not. If the overflow has been properly set to scroll, it's doable, but I've seen the odd site where the overflow was hidden and you had to copy&paste it somewhere else just to see if you wanted to paste it in an actual terminal

I try to do that, but there are a lot of times where I find myself thinking "I don't care, I just want this to work" and blindly copy anything that's not super fishy. Especially after nvidia updates.