Having a small child myself and traveling with her or my wife traveling by herself with her is hard regardless of the airline or the price of the tickets. Having someone help with the stroller is very much appreciated. I will always help another person with something like that, not for the company's benefit but because I've been there on the other side and would hope someone would extend the same courtesy to my wife. Those who wouldn't just to "not help the company" are complete douche bags. And I would tell that to their face if I ever saw that attitude.
Grow up. It's about helping a fellow person.