The best, or least bad, approach would be the one they did with Ghost of Tsushima, were the single player part was open to all while the multiplayer aspect required the PSN account. At least in my opinion.
I still remember how they said that you wouldn't need a PSN account to play single player games. Yeah, that didn't last long.
I guess boasting PSN gains in their earning calls is more important than selling a few thousand extra copies, and who knows what plans does Sony have for those accounts in the future. Who knows, maybe it's the first step for a future streaming service or whatever.
Please excuse my bad English.
Currently gaming on a PC with an i5-4670k@stock (for now), 16Gb RAM 1600 MHz and a GTX 1070
Steam / Live / NNID : jonxiquet Add me if you want, but I'm a single player gamer.