

Was it plain PLA? Some of the fancier types cause increased wear. I’ve seen photos of glow-in-the-dark filament having worn through someone’s heat block (not just the nozzle). Wood- or metal-filled PLA can also be somewhat abrasive.
Vacuum-sealed PLA can still be soaked with moisture—it depends entirely on how it was handled at the factory. To be absolutely certain, you have to dry it yourself.
The nozzle dragging, though . . . if the print isn’t visibly warped, that sounds more like faulty hardware or incorrect software settings—the printer no longer accurately knows where the nozzle is in space. Maybe your printer had a marginal part installed at the factory, and it’s now failed. If so, that’s no fault of yours and you should contact the manufacturer.
Speaking as someone who never has carried a smartphone, there are a bunch of tradeoffs. I do my banking in person, for instance, and that can be mildly inconvenient. I don’t take a lot of photographs (when I do, I use an old-style single-purpose camera). “Portable media” is a CD player, and I carry a paperback book if I think I might have to wait somewhere for more than ten minutes or so. And so on. Just continuing to live the same way as I did a quarter-century ago.
I expect, however, that it’s a lot easier not to miss what you never had in the first place.