I raid on Gaia, exclusively in PUGs. Am Japanese person, as well.
For PUGs in JP, the number one priority is clearing the fight, as consistently as possible. No one cares about parses or personal DPS or clear time as long as mechanics are done correctly and enrage is met, no matter how far into a raid tier we are, no matter how good everyone's gear is. No one locks certain jobs out of PF, no one says anything about meta comp. A safe, consistent strat gradually becomes mainstream and everyone follows it, a strat that is as braindead as possible. No one does out-of-the-box strats to increase uptime or get faster clears. No one pulls a "I want to try this, so I'm half-forcing you to do this to adjust" kind of thing. I can expect to go into a random weekly clear party and do the exact same thing that I did the previous week, or any other week. If you want to optimize your play or go for logs, you join a static.
Now, there are demerits to this as well. Because for many (not all) people who PUG exclusively, clearing the fight is the end-goal, so once they have the mechanics of the fight down and can consistently do them, they cut back on putting effort into actively improving their numbers. I've had runs where half the party parsed Grey. Just this week, my O7S weekly was killed during enrage cast. Do I call people out? Does anyone call anyone out? Not at all, as long as the fight is cleared with no major hiccups.
In NA/EU, if you couldn't skip Soar you were kicked (or so I've heard). In JP, everyone knew how to do Soar correctly, and skipping it was a bonus if you were lucky.