Which is obviously why you see so many dwarven archers, because people don't pick the race that's optimal for the class. Oh ... wait ... they do. Every archer type PC I've ever seen has either been human (to get sharpshooter at 1st level) or an elf for the plus to dex. Virtually every wizard has been a high elf for the +2 to intelligence with the occasional gnome. Every barbarian is a half-orc and so on. It's not because of lore, it's because of the ability score adjustment.
Some people don't care. I know I don't always. But a lot of people? A lot of players wouldn't know the difference between a half-elf and a half-orc if they met one on the street. They'll figure out the best numerical option available and go with that because most people don't really care all that much about what race they are in the first place. What percentage of players that is will vary by campaign and sample population. I just predict that when I do finally get back to playing AL that I'll see a whole lot of half-elves.
Time will tell. Care to place any bets?