The fact is, regardless of your gender, being unable to have children when you want them is unspeakably painful.
If the problem is carrying a child - either in terms of being male, or having a body unable to do so (disability for example) - surrogacy is a way around this.
"Renting" or "buying" a womb is very offensive, both to those who agree to be surrogates and to those for whom this is their only option to have a child.
I work in a caring role. I derive satisfaction from my work, but it is not my main reason for going to work - that is financial. It is all very well stating from (probably) the happy position of having children of your own that surrogates and surrogacy should be altruistic but the problem with that is that is has resulted in a huge shortage of surrogates.
We do things, often, because there is a reward in it for us. Helping out someone else is certainly a reward in itself but the reality of pregnancy is such that not many people are willing to undergo this for "just" the feel-good factor.
We pay people for services in most other aspects of life and I do not see surrogacy as being different in that respect.
The choice should never be as stark as "be a surrogate or starve" as an earlier poster pointed out. But surrogacy is an option for someone unable to have a baby and it is offensive in the extreme to sneer and dismiss it in the way that has been done so by some here.
I think having a family of your own is so utterly joyful that it should be experienced by everyone (if indeed that is what they want.) Life without children for me would have been a half-life with no real meaning. My children are my world and I would want anyone to experience how happy I now am.