...and here I removed the "(So no, not jarring at all)," because I thought it was obvious from the rest of my post.
edit: to be more clear - I've played all sorts of games over the years (JRPGs, WRPGs, etc) that have given you ways to get the rest of your party back up (either recovering on their own, or "resting", or feeding them Phoenix Down/Stims/MedPacks/whatever). And it's not been "jarring" because that's how the games worked. I've also played games where companions dying was a right pain (either due to requiring super-expensive costs to resurrect them, or having them die). And that wasn't jarring either, because that's how those games worked.
Because they're games. Not life sims, not "reality". Just like the vast majority of them (at least the ones with a designated "Main Character") go straight to Game Over if the main dude dies, even if there's a whole party of helpers there who could save the day and get him back up like he can do for them. They're games, with a set of their own game rules.
So no. No "jarring".
But hey - I'm just speaking for my experience playing games. No universal truth. Whatever, dude.