Why does it matter if they are out? Is it really that “flashy”? Mine go out because I don’t see why anyone would care enough about the factory white lettering. I thought once “ it looks neat” and never thought about it again. To each their own. When I see a white letter visible from the inside I think it looks stupid. I look under most jeeps I see parked just to check rust out of curiosity LOL. Just buy some without white letters if it’s a big deal I guess?I see them with and without them in shops all the time.
Do what makes you happy! They sell tires with and without the white lettering.
On a separate note, maybe a small amount acetone or something could remove it without damaging the tires?