I know you weren't arguing, I wasn't trying to either, I was just bringing up relevant info to our discussion. There is a right answer out there somewhere!
I can see your point about training areas, but I feel like strong metas will exist regardless. Pros, who often play significantly more than the average person does, will have preferred combos and legends and people will take their cues from them. If you watch any of the really decent people on Twitch, you'll see people asking a million times for their graphics settings, mouse sensitivity, what hardware they use, as well as asking about which legends and weapons are good.
I definitely subscribe to the school of trying it for myself, I know a lot of us do, but there's just as many that will rely on Google to tell them what to play.