My argument is there's too many blatant and over the top fantasy species with supernatural coding.
I get you, and there are certain settings in which this is an issue for me as well, but... this isn't a new thing. (And maybe you're not saying it is, but are just using the 2024 revision as an opportunity to discuss something that already bothered you.)
Of the 9 races in the 2014 PHB, only 3 (dwarf, human, half-orc) don't have features that seem explicitly supernatural. And to me, the ability to see in
complete darkness is obviously supernatural, which leaves human as the only mundane race in the 2014 PHB.
Of the 7 races in the 3.5e PHB, only 2 (human and half-orc) don't have explicitly supernatural traits, and excluding darkvision again leaves only humans as plausibly mundane.
Of the 6 races in the 2e PHB (which didn't include half-orcs), only humans are mundane.
And of the 7 races in the 1e PHB, only 2 (humans and half-orcs) lack magical resistances. Half-orcs possess infravision, which is at least plausibly mundane.
So going all the way back to 1e, only humans have remained consistently mundane, with half-orcs being close; all the other races typically include some intersection with the supernatural. In fact, the version of D&D with the least supernatural races was 4e; despite being viewed by many as a bit gonzo due to things like including dragonborn and tiefling as part of the initial race selection, out of the 8 races in the 4e PHB, 4 of them (dwarf, elf, half-elf, human) are completely mundane. The non-human races don't even possess darkvision; they have low-light vision, which doesn't allow vision in complete darkness!