I agree with MrMiyagi. Just because you don't get GP help yourself doesn't mean that those who do get help have no problems.
FWIW, I'm in your position, always have been. In fact, since my dds were tiny I've been the one helping my own mother, as she is widowed and elderly with health problems. I have no help from anybody and yes, it can be a bit galling when my friends head off for nights out, romantic weekends away, or even just go for dinner at their parents' house, have their Dad pop round to sort out the leaky tap or broken-down car, maybe the odd cheque to help them along. I would love to have that. But it isn't their fault that I don't, and bitterness will help nobody.
From the experience of friends, I can also see clearly that it isn't all roses if you get help. Arguments about how they bring up their children, when Grandma is much more indulgent and tries to stop any discipline being applied. Undermining attempts at healthy food - in one case, ignoring an intolerance. Interfering in marriages. Insisting on "helping", even when the help is politely refused, so that a 37-yr-old woman feels she has no input into how her own house is decorated.
The son of that particular family is 35, healthy and single. When he went on holiday last month his mother came round, cleaned his house and cleared his garden, including dragging huge fallen branches around. He had planned to do it when he came home. I can't speak for her son, but imagine what you'd feel like if you came home from a week in the sun and discovered that a tiny woman of nearly 60 who suffers from arthritis had done that for you.
Most people with help from their parents are, indeed, lucky to have it. But that doesn't mean that all grandparents give this help in a balanced and reasonable way. They can be bossy, overbearing, patronising and controlling, and if someone experiencing this behaviour complains about it, I don't blame them just because I get no help at all.