Porn usually focus on the man (or better say, the dick) being the source of pleasure for the woman. Even when he cums, the important part there is how much the woman loves it. The whole idea it sells is: women LOVE cock.
In fact older porn tend to shoot the face of the guy when he was cumming (which is very annoying btw) and now that is almost never the case.
I see what you are saying but this is also the confusing part for me and essentially why I can't watch straight porn. It's not just that the women depicted in most do not look like they are enjoying whatever is being done to them but also that it's so clearly fake. I cannot with all the screaming especially. The moaning when HE is cumming? This is made also for men who have been with a woman, yes?
It's impossible to suspend belief about just how much they're loving that cock even for one minute let alone for long enough to get into it and finish.
Also, why isn't the focus on the women loving the cock that actually makes her cum?
Zooming on the man's face? Wow.
Perhaps you are not as bi as you state ( kidding ). Really I could watch what is supposed to be lesbian porn technically hot and supposedly brings pleasure to a woman but I’m out of the equation and that’s the turn off. I won’t waste a second on an impossible, by the way, scarlet feel free to pop up whenever you want.
I'm afraid I couldn't quite understand everything you wrote but although I too, of course, imagine being in the situation of the people I am watching sometimes, I am mostly getting off from watching them feel (ie, the man, woman, cis, trans, no matter, the human I've chose to watch) their arousal, their excitement, the build up, the quickening of their breath, how they and their body responds when they are about to and start to cum, when they lose control over themselves, imagining the intensity of their orgasm based on that and whatever sound they might be making etc. The subtlety of how all that is expressed really matters to me.
As for the lesbian porn, that part I understood but most of it is also not quite my cup of tea for the same reasons as I said before. It is actually more fun to watch lesbians react to how absurd that genre is like
I also gave up on bi porn BTW because I mostly like watching MMF ones because even when it's bi men in these videos, the woman might as well not be there and it would be the same, if not better. I also hate the way they are mostly used as a way for 2 closeted guys to do stuff to each other... because it turns her on but while ignoring her. What?!
I'm not saying that there aren't good straight/porn/lesbian porn out there (and how I treasure them when I find them) but I seldom have the will or the patience for the time and energy required to find them, especially when I'm looking for something right here and now.
