Why can't my sim sleep thru the night in a tent?

Hmm...I mean, if you removed those traits, then I'd just wait until she's almost ready to pass out. Get her in the deep red. Working out usually depletes them pretty fast so maybe have her go for a jog. Maybe have her skip a night of sleep too, she should be pretty exhausted by the next evening in that case.

Also if you aren't opposed to mods/cheating, you can use UI extensions that allows you to increase or decrease each need individually just by clicking on that need bar. I am planning to do this aspiration with my sim too, and she has a lot of reward traits, so I might just plummet her sleep need one night and hope that works, since she won't get tired enough on her own I'm sure with her reward traits.

You could have her angle for big catch until she gets tired or let a vampire drain her energy.

I use a mod to make sims sleep through the night. I dunno if you use mods, but that's one route to take I guess.