Quite honestly? I never saw a reason to because my default "I just throw random sh*t" moveset kept me above average for the past five years on quite literally all shipclasses. My GB skills are frozen in time since 2015 and put me up with the real good ones now apparently.
Aspiring to become ace tier has no reason in Discovery for me, since outside of conn the likelihood of actually dueling another ace is extremely low. I actually consider it to be tiring if I dominate an opponent too hard and go out of my way to do goofy nonsense in duels then.
The time argument also adds on it tbh, 2020-2022 I had the time to train but never saw the reason. Now I would additionally lack the time too.
I can still deal good dmg to our aces so why would I care for more?