I honestly don’t think so. Ton of not objectively good looking people (I don’t want to say unattractive because it’s subjective) are very happy in personal life and are successful professionally. And ton of good looking people aren’t happy or successful at all.

As about men and women being friends I don’t see it as looks issue. Some people simply avoid it for number of reasons (too many temptations, spouses might have s problem with it, some society pressures etc).

I have some more thoughts and examples on that but have to rush so possibly more later

I mean in some ways being attractive does help to some degree: easier to get a date for example or get a job where you need to look certain way like acting or modeling.

But in a long scheme of things I just don’t see the correlation. I know a lot of people and lived on two continents and I simply don’t see much of a correlation between looks and long term success or happiness