Anywhere you are in the world, anyone that sells to anyone public is called a retailer. They can try to spin some fancy term out of it to try to conceal that they are in fact a retailer but that's what they are. It isn't semantics. Wholesalers, by the very definition of what they do, are not retailers, they deal strictly within the industry. That's the whole point of wholesale. It's the industry's trade. It's not an opinion, it's a trade term. If you sell to the public, at any point, you're not a wholesaler, you're a retailer. So your former employer is not a wholesaler, he's a retailer. He had sources for his goods, and he traded goods on that market and in turn sold goods to customers. Real wholesalers don't deal with the public.
Plenty of people have done very well buying online, though. You might not agree with it, but that's your experience and opinion. It will vary from others. And buying from a reputable seller, you can return it if you don't like it in person. I take a TON of my time trying to educate people on here on how to buy quality stones, both online and in store. Not everyone wants to take the time to go in store, pay a premium for overhead and housing stones. Some like the option to buy online where they can see the stone in images, which can be very telling, and have the vendor run tests using devices that most in-store vendors don't have and have never even heard of, tests that will weed out duds that you would notice the differences in person without having to spend the time driving around seeing them.... It is a difference of opinion, sure. But it works for a lot of people.