Generally I agree with the idea of playing seriously at all times.
Unfortunately even if you play carefully, table roll and other hazards will bite you.
Can't avoid them all. So it adds extra luck to the game.
Just speaking for myself... playing hard only to have lady luck wreck the outcome really puts me on tilt.
So my best recourse is to try to keep a relaxed, almost carefree mindset. This prevents getting into a funk.
If I go into "serious mode" and then I get shafted by the equipment, it's just going to wreck my evening.
So to answer the OP, this is what works for me and allows me to overcome the frustration
and play good solid pool.
No decent owner will kick you out for asking them to address the tables. I've done it plenty of times.
They generally either tell you it's planned for the future, or say "the money's just not there right now".
They don't get defensive and kick you out. Maybe if you did it every day until they snapped.
Apples and oranges.
I never saw bowling played underwater either. If the roof leaks, should a bowler
'suck it up' and accept water hazards as a normal part of the match?
The idea seems to be shitty equipment is common, therefore it's acceptible.
It's not. Good equipment is also reasonably common... vote with your wallet.
PS: Not sure if you got the memo but league play is considered casual
Professionals are banned from most leagues, 99% of us don't play in a "professional" league.