I answered, "No."
But more explanation is needed than that. If a good GM I was familiar with was offering to run a typical DnD game that was "Humans Only", I'd probably say no. That's a big turn off for me, since I almost never run humans. I strongly prefer to play characters that are more unconventional, and that are outsiders in some fashion.
But if it was a good GM, and they had a really good pitch for a game, then I might buy in to it. For instance, if they were going for a bronze age, sword and sorcery vibe, where non-humans were rare and tended to be monstrous in some fashion, I'd probably play and stay within the bounds the GM was asking for. Or if a GM wanted to run a gritty mercenaries campaign reminiscent of Black Company, where there weren't any non-human races in the world, or something inspired by Game of Thrones, yeah, I'd go for that. But none of these concepts fit the idea of the "typical" DnD campaign.