re: Is having a credit score really necessary?

I will answer the question you should have asked "Is a credit score worth a shite?"

- No, it's a laughable model to use as a whole, amongst many other issues. That being said, I acknowledge that there are few other blunt comparable alternatives so institutions will use what they can, and most banks/users have their own modifications and use it as a basis for a forward looking framework.

Your original question is asinine, of course it's possible, but it's not wise as many have pointed out. Hard to be seriously wealthy without levering up brah.