It's worse than this! You Type C-H-E then you go to press enter, and it changes the results as you're pressing it, opening the wrong thing! I've turned off all the search targets, except for applications and folders.
Yes. "UI Speed" should be a configurable thing, so that if the UI changes as you're choosing an item, it acts instead on _what was there_ at a brief moment in the past, e.g. 20-50ms ago.
Don't worry, airdrop does it too! I've accidentally sent airdrop requests to strangers from their profile picture moving under my finger as I'm approaching to touch someone else's. The single most idiotic design I've ever seen in UI. I don't use airdrop for anything sensitive anymore, obviously.