casual players don't care, we shouldn't use them as the standard to strive for tho. 30fps sucks, end of story. just because people are ok with it that are casual consumers doesn't mean it's good or even ok.
during the PS360 gen people were ok with 20fps... should we drop to that next just because FarCry 3 sold millions on PS3 running at 20fps? people didn't care right? so it's good right?
should we go back to the million seller GoldenEye and run at below 10fps? sold 8 million copies even on an underperforming platform as well! and it got great reviews! 10fps is therefore totally fine!
why stop there? people were fine with 240p 10 to 20 fps on N64, let's go back to that too because, 8 million people bought it so it must be ok!
and you can see it the other way around as well. I already posted this, but the most popular games on Console are basically all 60fps games... all of the top console titles are 60fps. Fortnite, Call of Duty, Minecraft, Apex Legends, FIFA, Madden, NBA, Mario Kart 8, Smash Bros, Splatoon 2... games that millions play and stay popular over time, all of them 60fps
so you could argue that 60fps is what makes people subconsciously gravitate towards these games, because even if they never heard the term framerate, they can feel that these games simply feel better to play than 30fps games.