I was honestly not too personally bothered at first, since the change might not affect me. Still, when I found out others might be screwed by Sony when PSN is enforced, I stand in solidarity with them.

Additionally, Sony says that PSN isn't required to play PlayStation games on PC: From Steam Keys that were purchasable directly from Sony:

Archive.org link

Do I need a PSN account to play PlayStation games on PC?

No, you currently do not need a PSN account to enjoy PlayStation Studios games on PC, but you will need a Steam account to redeem your voucher code. Some of our PlayStation Studios titles also offer incentives for linking your PSN and Steam accounts.