You could limit your definition of good to the 99th percentile and it would still be true.

I'm t might seem so if you only ever worked in tech, but there are huge companies out there that employ way more sales people than technical people.

Yes, of course, because all industries need sales and salespeople are extremely valuable to the business.

But in software, like all industries, the best salespeople are also domain experts, and domain experts in software are rare before you add the need to be able to sell.