There's no way I can prove this brilliant flash of insight, but way back in 1980 I said (to the scant few who would listen) that Ronald Reagan's greatest mistake was selecting GHW Bush as his running mate.
I saw no benefit then (and see none now) in getting in bed with faux conservatives of the CIA/CFR/NWO/etc ilk.
IMO the body language in this photo tells you everything you need to know (and hate) about American politics:
Jeb Bush is channeling Monica Lewinsky in that photo.
So why did GHWB and Jebbie exclude George W. from the photo?
I think I am on the same thought train as you are relative to the Bush family. It is my understanding that Reagan had to choose Bush1 to get the money changers on Wall Street to not undercut his efforts. I sense that same political background and push as to Jeb Bush. The Bush family to me has always been one of those who put themselves as paramount above the peasants. Their coziness with the throne of England and oil sheiks in the middle east sets them above many USA citizens.