Just being small/petite is definitely not the same as loli.
I mean, one of my teachers way back was 4'8 - wouldn't have called a woman almost in her 60s a loli ...
(One time she brought her son to class, and he was ~6'0+
)
On the other side, there definitely are games around that tell you everyone is 18, but unless some girls have some mental handicap, there would be no way someone 18+ would act like that.
Up to a certain point, I have no problem with that, but depending on the game there might be certain girls I'll therefore try to avoid. They can be labeled 18+ as much as the dev/Patreon/F95 want - it just feels weird/wrong for me then.
But playing a loli game and avoiding them all ... is strange.