>There aren't even rules for infections,
1st ed. AD&D DMG says there are.
>so the only thing necessary is for the character to get out.
No. Many OSR groups make multiple trips back and forth; clearing out one section at a time.
>How are you talking about working towards being a badass but you have a problem with characters pushing on while injured?
The DM doesn't have a problem with anything they choose to do. They can either push on, or go back to town. My group has done both lots of times. Quite often they debate (in character) whether or not to push on, and it adds another layer of drama to the session.
>Or maybe people just don't want to play the same kind of games you do.
I've played both.
>Level 5 is hardly badass from what I've seen of Pathfinder
That's because power creep.
>but you're competent and have more options than "I hit it with my sword" and you're threatened by threatening things instead of housecats.
I see you've never been kicked by a wild horse. I have. That is a threatening thing.
I see you've never been chased by a pack of wild dogs. I have. That is a threatening thing.
I see you've never been surrounded by 3 normal sized men, beat to the sidewalk, and then kicked in the ribs and stomach. I have. That is a threatening thing.
Sometimes people actually die after a single punch to the head. That's how we play.
And you only think you have "more options." In the older games, you really could do anything you want. The rule is, "Don't say no, but rather determine difficulty." After 2nd Edition, the DM has to say, "No, you have to be 5th level to do that." I played a gunslinger in Pathfinder. I tried to cauterize a wound with my pistol, and the DM was like, "You haven't earned that feat yet." Seriously, wtf? That's limiting the player.