If I need to replace the entire transmission anyway, can I wear the old one to death?

Probably a dumb question 😅 but I know next to nothing about vehicles, other than what I google!

My 2016 Nissan rogue needs a new transmission. It's got 267000+ kms on it so it's not surprising. It's currently running fine, just a bit of hesitation, but the check engine light came on (codes p0776 and p17F0)

As it's an old CVT, if we decide to keep it at all, we'd replace the whole transmission. (I knooww, like $7000 💸😭)

My question is; is there any danger to the rest of the car if I simply drain and replace the fluid then drive only short distances while babying it until it gets worse?

Like worst case scenario is I get stuck at a stoplight and have to call a tow truck? Then I assume I'm just back at square 1, having to replace the transmission.

Orrr is it going to ruin something else making it a more expensive fix? (Or explode and kill me in a firey death? Haha)

Sorry for my dumb question 😅 thank you for your time and advice!!