Depends on the context of the setting and the story. I mostly tend to allow all official PC races without any objection. I see an adventurer as an outlier of society and not the norm.
In the games I tend to run I either swing between everything is allowed or just one is allowed.
If I want to do an mini adventure about a goblin clan fighting a kobold incursion, then everyone is playing goblins.
It’s the spot we choose on the empty canvas for the RetroDECK logo.
https://canvas.fediverse.events/#x=543&y=130&zoom=1&tu=https%3A%2F%2Fi.postimg.cc%2F0N1Nq2Sc%2Fretrodeck.png&tw=50&tx=609&ty=320&ts=ONE_TO_ONE
But as a DM myself I hope we can both coexist.
The RetroDECK Team loves D&D and TRPGs