While I agree that it's not for everyone and people should have a right to decide how they spend their time, I think it's detrimental even for those who claim it is good for themselves.

If you actually ask, "Who is this for then?" -- I think you'll be hard pressed not to answer "For the young, socially less inclined(men)", just like drugs are for certain demographics or polygamy is for certain demographics, teenage marriage can work for certain people and so on (sorry if my examples are too extreme).

And by accepting such horrendous work hours you are pressuring people who actually want a better work-life balance, that's why I think it's better for society in the long run to forbid such (predatory) practices.

Just because it's detrimental or suck for you doesn't mean it also the case for other. Likewise for drugs and polygamy.

That's just reality of life.

And if you outlawing the practice, its sucks for those people who want to prefer those you think "horrendous" work hour.