I care.
In our games, consistency and continuity in the fiction are paramount - as IMO they should be.
@pming 's terms is APC, we call them QPCs: Quasi-Player Characters, defined as "a character active in a session at which its player is not present", and if you've got a character in a party and can't make a session, it becomes a QPC for the night. QPCs are halfway between PCs and adventuring NPCs. They still earn xp, take risks, and do whatever else they'd normally do based on their established history and persona.
Also, in these days of always-on 24-7 communication, any really earth-shattering decisions for the QPC can - depending on the real-world situation - often be sorted with a quick text to the player.
Also, contrary to your experience, the risk of bad things happening to your PC if you're not there has IME been something of an incentive to show up.