It's also an argument that isn't applied equally. Everybody gets upset when people ask feminists why they advocate for the issues of women in first world countries instead of working for the betterment of the people in, for example, Africa, but when MRAs advocate for the betterment of men in western society, it's suddenly okay to call that "misdirected effort"?
Either it's applied equally and everybody who isn't working to help those who need help the most gets shamed, or we just let people fight for whoever they want to fight.
Or, and maybe that's the most reasonable version, we do a bit of both, but still apply it equally.
Anything else though... that's just selective application of moral values.