Actually, yes. I always find it dumb. However, even a bad blowjob is still a still a blowjob. as long as they're not biting it's eventually going to work. Women are not that simple, and if you're taking cues on how to please women from porn, you're going to be absolutely terrible and probably hurt them in the process. I give these games a lot of suspension of disbelief with the oversized dicks, and being able to just get all these women in bed despite having the personality of a worn out leather boot, and women agreeing to be in harems, and ignoring refractory periods, etc. because it's fantasy. And even if the girls watching porn to try to learn is stupid as well, it still plays into the fantasy because even though it's naive, they're still doing it because they want to please the MC, and generally the ones that do are still timid and have no idea what they're actually doing.
A male MC claiming to be good at fingering girls when he's never even touched a pussy before because he watched porn though? dude get real, he'd give her friction burn before he ever got close to giving her an orgasm.