I figured you were one of them.
Everyone who speaks English as a native language has used the ‘singular they’ without thinking, many times. I don’t even recall it ever being an issue until the relatively recent kerfuffle over pronouns as they relate to sexual identity.
Natural language is a lot more than strict grammatical rules; a lot of it - and its efficacy - comes down to collective, accepted usage - which is constantly evolving.
(And now that you’ve shown yourself as not only very small but insulting as well, I’m finished. Have a nice holiday.)