I know you're joking.
But you should know, I have actually dealt with people, on and off for basically the entire run since I got into 4e (so about 14-15 years now), who both think that and believe it is perfect justification to exclude dragonborn from D&D completely.
I was once told, on this very forum, by a genuinely well-meaning person trying to be positive, that I should be thankful I got playable dragonborn at all.
Frankly, IMO, if you're completely allergic to any form of reskinning whatsoever, I'm a bit confused about why you would continue to play TTRPGs. It's an essential skill. That doesn't mean absolutely every instance of it works--e.g., I'm with you on "reskinned spells are not and never will be psionics" and similar things, like "a reskinned spellcasting Bard is not and never, ever will be a Warlord"--but some amount of reskinning is invaluable for allowing basically anything that isn't perfectly rote bog-standard stuff. Being able to repurpose monsters from their initial context into something that works for you seems to be an invaluable skill, and that would usually involve at least some mild reskinning.
Otherwise the only place you can fight a hydra is the Argolid.