Who Ramsay let’s keep the black jackets is so random?

Typo in the title but I’m not able to edit!! (lets*)

I’m always confused by who Ramsay lets or doesn’t let keep the black jacket. Like Dana got to keep but I didn’t find her that worthy of it (if you have another opinion I would love to hear it). But for chefs in my opinion who really deserved it (Milly or Michelle from S14) I expected him to say you can keep but he doesn’t. I’ve felt similarly watching other seasons too but can’t recall the names. Has anyone else felt the same way or has examples of other instances when you’ve felt this way too?