They contain less pesticides on average and pesticides are directly linked to cancers but you do you

Also several studies mention they have higher level of nutrients, vitamin &co

Eating bio veggies won't make you cancer proof, but the again smoking a cigarette a day won't guarantee you a cancer either. It's a game of luck but some things help while other things are detrimental, I personally see no reason to buy pesticides riddled veggies when I have access to cleaner ones

https://pubmed.ncbi.nlm.nih.gov/20359265/