I think posters are being unfair as we all want the best for our DCs, a happy childhood, and often that includes doting GPs
We all come at these things from our differing perspectives. I never really realised that GPs had a close relationship with grandkids, both grandfathers died before I was born and both my grandmothers were quite old when I was born, lived a long way away and were distant figures that sent me money for my birthday and Christmas, I sent them cards and saw them once a year at most.
My MIL has six grandchildren and was getting on a bit by the time my son came long. She does send him things, and has done him a stocking etc but has been far less involved in his life than she was in his cousins due to being older and living further away. It would never occur to me to think that this was in any way unfair. He doesn't have a lot of contact with his cousins so I don't suppose he has any idea that she was more involved in their lives.
My mum only has the one grandson but lives a long way away. However, she does see us as much as she can, my son stayed with her for a week in the summer holidays and they have a reasonably close relationship. It's nice to see but it's not something I was particularly concerned about either way, because I didn't experience it myself and didn't know that I was missing on anything. I think she feels she's missed out a bit through the distance though.
BUT your more recent posts do beggar belief. So your sister is allowed to work, but you're not? That is just bizarre.