I've heard this line many times from women over here.

But they don't stop to think, that a healthy man is more likely to end up married than a disfigured or diseased one, which on its own can affect life expectancy in a big way. With every disadvantage, your rate of marriage drops as a male.

Women might not be doing anything to increase his life expectancy.

If women actually increased your life expectancy, existence of two women in relationship would boost the life expectancy of atleast one of the woman but data says it clearly does not.

Lesbians on average make more income than straight woman yet have lower life expectancy than straight women

In terms of life expectancy,

Lesbian < straight male < straight woman < gay male

Childbirth/Pregnancy is protective againist Auto Immune Disorders and Breast cancer as well.

Men aren't responsible for everything bad that happens in a marriage, they are merely a scapegoat. Life is terrible on its own, it's easy for most women to blame it on the male for ruining their life, when even if they were single there life wouldn't be much better.