USERNAME IS YOU splash text is hardcoded

I'm actually on 1.17 but that wasn't an option so let me know if it got fixed from 1.17 to 1.17.1 (I assume it didn't).

So apparently, that splash text is hardcoded and not in the splash.txt file... which means that it will always show up no matter what you do.

I'm trying to make a texture pack with only custom splash texts and that one keeps popping up and it seems like there's nothing I can do?