What I am hearing you say is that the patriarchy victimizes men. Absolutely it does. It’s also created and maintained by men, so I don’t think elevating men is going to be a primary solution for fixing it. However, pointing out to men the way it damages their mental health and limits their life choices should be an effective way to turn men against it.
One really simple answer: people of popular-music-making age in the ‘60s and ‘70s were worried about getting drafted into a useless war. Sure we have plenty to be upset about, but the visceral threat of you or those you care about getting shipped off to ‘Nam was fertile ground for protest songs to become a major chunk of that era’s pop music.