I've had many first-time customers I could tell would never come back because their first experience in the restaurant was on a busy Friday or Saturday night with a server who was triple-sat and a bar (and sometimes kitchen) that was backed up. And they all had this vibe like it was a routine experience for them trying out new restaurants.

Also, the idea that trying to seat people faster actually increases revenue isn't exactly scientific. You can't run an experimental and control group with how you handle a night in a restaurant. But most of the scrambling I've seen restaurants do to put asses in chairs as fast as possible gets them 10 minutes tops, maybe 15 minutes if they're really lucky, but it's usually around 5.

So it would take multiple turns happening as fast possible to even get that extra table in there. I get efficiency is important but if it makes no difference with the time left over, so it's pointless to rush everything to the point of making good service less possible.