A+ content without a brand registry?

Hi, I just realized that I cannot do A+ content without a USPTO + brand registry through amazon.

I have been seeing a lot of sellers here suggesting not to do brand registry until things pick up.

But my question is, how do you promote yourself to customers without A+ content? Do people even buy from reading a block of text in the product descriptions? I just feel like there is no point in running ads without A+ content since there are 0 customer purchase history. And without ads, it is impossible to rank organically as well?