I'm going to prove that there is a such thing as a dumb question.
How do you try?
I feel like I knowingly make sub-optimal decisions. For example, I had an opponent standing on stage, waiting for my get up option. I could have shino stalled to force him to give me some space and attempted an invincible get up, I considered it, very briefly, before going nah, roll up the ledge.
They wavedash back, fsmash, RIP Sheik.
Same thing happens in neutral. Consider some options for a situation and end up going with "just dash attack" and get punished super hard for it.