Not me.
There are millions of grandparents raising their grandkids because the parents have other things to do. I see some of them picking their kids up at school. Mostly they are too old to take the kids skating camping etc. Some can barely walk. Their grandkids are not in scouts or sports.
You may find it healthy and personally fulfilling to become, at age 71, a fulltime nanny for 4 years and enjoy Moms society work, gowns and jewels and state dinners vicariousky. I don’t.
It’s not about her being their nanny. There’s all the help in the world for occupants of the White House. It’s about their emotional stability under very trying circumstances.