So, this post brought up an old topic here about men, being attractive, and gender constructs/roles.

On one side, feminists claim that masculinity is oppressive to men, and the expectation for men to be fit, muscular, or tough should be abolished:

Masculinity and femininity are artificial, manmade to keep the gears of a society turning. I believe both men and women are oppressed by the existence of radical gender roles like we have today.

Just because in our culture men are not allowed to admit to insecurities does not mean they do not exist. Men are under just as much pressure to be good-looking, the breadwinner and hypersexual as women are supposed to be sexy and submissive. The difference is that a central part of masculinity is confidence, and frankly, if a man is not confident they are less of a man.

http://dailycollegian.com/2014/11/20/masculinity-a-feminists-perspective/

However on the other side, you have posts like the one from PPD I linked, and this one:

So let's just clear this up. LOOKS MATTER. TO WOMEN TOO. Everyone wants the same thing in a mate — someone to be with that you want to fuck but can also hang out with. Want to fuck means attracted to. Attracted to means likes how they look.

What happens is, the dichotomy of these two perspectives lead men in circles. Not all men, but some men. Mort importantly though, these perspectives are at odds with each other. Here is a hypothetical story:

  1. Guy asks a woman if he needs to be more manly or fit to be successful with women.

  2. Woman says that masculinity is a social construct, and "you shouldn't feel the pressure to be confident or muscular". "Just be yourself".

  3. Guy listens to woman.

  4. Guy see's a muscular, confident guy taking the woman out on a date.

  5. Guy says "WTF I thought you said men don't need to be masculine?!?!"

And the cycle repeats itself.

tl;dr: The attempt to deconstruct masculinity is harmful to men because it makes them believe being attractive, muscular, and confident is not important for attracting women.