Decent bike is too much a target left at a station for any length of time regardless of lock.
Heavy lock left attached to the rack if used frequently is an idea, but may get removed by authorities as litter. ? label with an address tag, and move it from time to time.
but a decent heavy lock will cost as much as an inexpensive bike, and weigh close to it.
If you are having to disassemble the bike to secure it , you are in the wrong place with a bad idea. Rethink things.

and I would advise that bike theft is a vice
@ tomtomtom123 "You don't need a vice to break the folding lock with a nut splitter."

If you are out with a friend and a lion attacks , you do not need to run faster than the lion , just your friend.
Holds for bike security better than any other advice. don't be the most attractive target.

Nothing is quite as invigorating as a bike ride after a double shift.
But I have never fallen asleep when biking, either.