Re: both parents work, kids with inlaws?
Nadz, I believe that your point is that grandparents should not be forced into caring for grandchildren. Of course, no one is going to disagree with you there. But many people actually LOVE being able to do it. If it works for the family, what's the problem?
Parents never stop caring for their children. Just as yours are helping you out during a challenging time in your life, others will want to help out their daughters pursue the careers and degrees that are important to them. If they are able to work out a good system where everyone in the family feels like a needed and productive member, isn't that great?
I wanted to be home and raise my daughter, at least for the first few years. My MIL did offer to help out, but her daughter just went off to college, and I didn't want to restrict them when they had just gotten their freedom. And my mother said she would love to if she could (she works). But I wanted to be at home and my career is not severely affected by my choice to take a break. I do think it was the right choice for me and our family, but I definitely have good alternatives.
When I run errands, both mom and MIL happily watch her, as do her grandpas. Mymother actually seems to really crave the contact with her. My father stops by regularly to play and look after her so I can get some chores done. They love feeling connected to her and they are productive (this has been particularly important for my father who was laid off a while ago and has been struggling to find work). It's amazing what Bunny's birth has do e to rejuvenate my parents. After my surgery, when I was at my parents, my mother insisted on taking her over night, even when she had work the next day. It was something she really wanted to do and she knew it gave me a break. She was looking out for me and getting some bonding time with her granddaughter.
Anyway, my point is that you cannot assume about others' family situation like you did. About grandparents saying they can't do such and such because of the kids, sometimes they are making and excuse. Sometimes they really mean it. Parents say the same things; doesn't mean they would give up their child.
I do think that in such situations, parents should consult grandparents when planning vacations, so that they can get time off to travel and visit others. It would be good to work from home some days too, if possible, or try to take days off here and there, to give the grandparents flexibility. The point is, as long as everyone is co tributing, being open and considerate, this situation can be wonderful for the child and her/his family members.