
Nothing new is never proven. I remember in middle school when I was told vaping is better for you then cigs and wernt bad. I’m not saying sunscreen causes cancer but I don’t think it’s impossible that the chemical in there can harm you and cause damage to your body. And maybe that is less bad than the suns damage but it could be there.
Sunscreens have been around for a long time, and the chemicals used in them are very well-studied. It’s not impossible that they could cause some sort of harm or increase cancer risk by some amount, but we know beyond any reasonable doubt that they are much less harmful than the sun, which is definitively known to be a carcinogen.