The Chinese Navy on average conducts 3.5 submarine patrols a year since 2000, that is out of a fleet of over 55 submarines. Our fleet of around 50 subs does 100 patrols a year on average.
Yea our ships leave port and do stuff that is why they wear out so fast!
I would rather have crews wearing out ships that have ships and crews sit around doing nothing. Crew training is the most important single thing in the Navy,
without highly trained crews we might as well be the Saudi Navy...