Cos i'm not a girl and i don't aspire to get dicked ferociously. So i don't find enticing to be on the subjective of someone getting dicked. I wouldn't feel odd if every now and then a submissive female protagonist game came out for the more unconventional kinks, but there are loads and loads of them while you hardly find the counterpart with male domination on an RPGM setting. It's counterintuitive if you ask me.
The thing with fp male protag games is that either you play a protag that will share his woman or you are the only person who fucks her. Which means you are giving up part of control over her or only one dick for the whole game, banning all the gangbang, exhibitionism etc. elements which would imply sharing. For example in "iNSight of you"
. The goal is to not become a looser watching from the sidelines as other men fuck your only woman, even if you gave her away as a show for your power, you will still be kind of a cuck if its the only one in the game. Here, we are influencing the female protag into doing those things. You dont get into the role of the female protag, you are directing her as a third person, influencing her. It stays a game without immersion.
This is also the only reason I can still play those NTR games. I only play them when I am either the one that cucks the male protag or when I influence the female protags actions as a third person. I generally feel disgust from the male cuck and I'd rather him not being there at all, but those two options mean that the cuck may have short screen time. If you always had this first person male protag which you would be immersing yourself into, you might face a loss. For example, having her pregnant, you dont want the woman of your children to be fucked by smelly 60+ (age) men. Corrupting her in fp as the male, many will become somehow attatched to her. But if you stay in third perspective, you can let the protag do whatever you want without facing a loss.
Tltr: Its just a matter of perspective, stay in third person with female protag games. Male protag games have a chance to make the male become a cuckold.