Nikon’s camera sensors come from Sony. But Nikon engineers always do some magic. That’s why NASA uses Nikon cameras in space. Canon is arguably the best, but also the most expensive and not friendly to third party lenses. Sony lets you put any lens you want if you got the right adaptor. And that photographer you met isn’t wrong, but that is exactly why professionals have to edit their photos after a shoot. With Fujifilm I try to do it all in camera cuz editing hundreds of photos becomes exhausting after years.