The problem is that, while you can see feminists protesting many things, show me where they were ever concerned that fewer men were going to college, for example. Or that American law makes cuckolded husbands pay for the children of a cheating wife, even after confirmed non-paternity.
It's not as simple as "feminists also protect men" because they clearly aren't very interested in the male side of the coin.
I'm sure you've read the reading of every feminist group out there?
No, feminists are not concerned that fewer men are now going to college. This is because the inflated rates of female attendance are thanks to--surprise surprise--our credentials having less clout than a man's. So for the same job, we need more education and experience to get it. Also, you know, studies showing that the claims about men being disproportionately punished in school... girls are disproportionately punished for being loud, playing, or even moving at the preschool years. Boys get the "boys will be boys" point of view, which forgives a lot of that. So basically, if you're already taught to be quiet and not saying anything, no, you won't be punished as much in later years. You've already been indoctrinated.
Let me put it this way: a lot of the MRA demands frankly, based on our best research, are wrong. We need more nuanced research into things like male vs. female educational styles, and find out if the whole desire to separate classrooms by gender will result in "separate but equal" problems or comes from misogyny ("we can't have those beguiling females around our sons!"). We also need to, frankly speaking, start treating women and girls like viable research subjects, rather than a special interest group.
But yes, you're right. The main concern of feminism is women, and though they aren't against men anymore, that sure as heck isn't the main focus of their efforts. What I'm trying to say is that that's what male activists often call themselves, not necessarily that
all of their aims will be satisfied that way.
First wave feminism: Suffrage now. Also abolitionism.
Second wave feminism: Fuck being pregnant, barefoot, and in the kitchen! Anyone who disagrees is a slave of the patriarchy! Let's go be just like men!
Third wave feminism: There's nothing wrong with femininity as such. What we should do is based on
moral standards, not preconceived notions of gender. And a lot of the moral standards are wrong because they encourage self-destructive behavior or, you know, general rape culture and so on. And sexist oppression affects people differently depending on their situation inside other power structures. We need to change media representation to describe oppressed groups as non-monolithic and unstereotyped, hold onto abortion and improve rape/domestic violence prosecution, and change a whole bunch of little things that are together coalescing into a miserable situation.