I would much rather have a DM who has a clear vision for their world and works hard to deliver a tone and style unique to them than giving everyone a vote. A DM has to be enthusiastic about their game. If I would like to play a dragonborn but can't I can always come up with a dozen different characters that will fit. There is nothing unique about playing a dragonborn that I can't replicate RP wise with another race.
I'll agree that a DM who has a clear vision and works to deliver a unique style and tone is (usually) a big plus.
But so are players who advocate for their interests and who express enough interest in the world to want to influence it. Very few DMs have a world that is SO developed that all or even most ground has been covered.
If a player comes to me with a race, if I have an ACTUAL reason to not let them play it - I will say so. But if the reason is, I just hadn't thought about that race? Then more likely that not, we can have a discussion about fitting that race in.