She's thinks she's being smart, but perhaps been suckered in by marketing a touch. A fren worked in the Ag industry, and spent way too much time walking fields throughout his career. He wore long sleeves and a hat, but is now getting shit burned/carved off his face, hands, neck - parts that weren't always covered. He wishes now that he'd doused himself in sunscreen heavily back in those days. Cover up first, then apply the potentially carcinogenic shit if you feel you must. If you work in the sun, probably makes good sense to proactively protect yourself. If you're purposely suntanning, it probably makes good sense too - but you're an absolute fucking idiot for sun worshipping. Guarantee you there is nobody who makes it to age 60 and says: "Gee I wish I had spent a lot more time out in the sun without protecting my skin back in my youth". TLDR: Sunscreen is a necessary evil if you have unavoidable and sustained sun exposure.