Honestly, I look around the world and don’t see much, if any, practical difference.

The US has had two presidents that were direct relatives, I can’t believe that’s by pure chance or some kind of genetic skill at being president.

If you don't see any difference between people who won US presidential elections and those appointed for political favoritism, then I don't know what to tell you. Also, if you look at the current state of the UK vs US and don't see any difference then you need to get out more.

Well. Looks like you don’t know what to tell me, hopefully someone who does comes along.

It's because people find comfort in what they know, nothing more complicated than that.