I think also does not have to go through the extreme. I know many people who just drop their kids to the grandparent's home constantly and expect the grandparents to take care of the kids as it is their responsibility. (I have heard this from both single and married parents, I am not assuming).
I think is ridiculous, one thing is to lay a hand when is needed another one is to take advantage of it and expect your parents to help you daily with your kids and finances. If someone decided to be a parent (and even if they did not) has to realize that there are certain responsibilities that come along with it. This thing of "go by auntie she will help you" "go by granny, she will pick you up" "go by uncle, he will drop you..." constantly is not what parenthood is all about. Parents (regardless of their marital status) need to take charge of parenthood and not pretend to "throw" that responsibility towards friends and relatives. Just my opinion.
I fully understand that in the case of single parents, they need a little more support from their friends and relatives, but even in cases like that, advantage should not be taken of the generosity of others.