Sunscreen - yay or nay?

When we were kids, we rarely used sunscreen. When we did it was spf 10 or 15, feel like it was the 90’s before we saw spf levels of 30 on the shelf.

Here is my thought process, and I’m wondering if I’m on the wrong track—or not. Was sunscreen only necessary due to the hole in the ozone layer? And now that the ozone layer is on track to be back to 1980 levels, will we require it in the future?