Okay, but you are missing a lot of different factors here.
First of all, you are ignoring the fact that the entire game is run by and played by professional actors. That is a big factor in people's entertainment.
Secondly, many of the cast members (if memory serves) would say that the game they are playing is their first time playing DnD. I know Matt played before, and Liam was the one who proposed the game, but I'm pretty sure that Sam played for the first time when he made Scanlan. Might have been the same for the others.
Minigiant on the other hand, seems to be a person who, like a few of the people on this thread, have been playing DnD consistently for decades. They might be bored playing an elf, because they've been playing for 20 years. They've seen dozens of elves.
Finally, Tal'Dorie, the world, is not restricted in the same sense. Between Exandria and Wildemount, I think the majority of the options are there explicitly.