[WA]

- You didn’t think this through

- That was a stupid idea

- Do you even have a plan?

- Do you know what you’re doing?

- Darwin awards

- …

I think there is a lot of cultural concern about not thinking enough.

[WJW]

I was going to post basically this. There are tons of people saying "you are underthinking this", but they almost never use those exact words. (BTW, to the point where my spellchecker flags "underthinking" as a word that does not exist)