So, I started thinking about the title while reading a Reddit thread about adventurers with disabilities, many people there were claiming it was a ridiculous concept, since they couldn't possibly survive the dangers in dungeons and such. I initially thought it was silly argument, since in the games I've played even a completely healthy person would probably die a hundred times over between all the fights with giant monsters, being hit by lightning, fire, explosions, bullets, and waves of poison, getting beaten to a pulp and completely recovering in a night, etc. The PCs only survive due to superhuman abilities granted by their classes and general D&D mechanics, all of which a disabled character would have as well.
But that's not necessarily how people play, and a lot of games have more grounded situations for the players to face, so I figured I could ask here what people think. Could real people survive in the games you've played or DM'd? A party with normal human limits, with no class abilities, magic, luck, divine favor or any game-granted ability that wouldn't be possible in real life. They can't use any modern technology or metagame knowledge, but they can be as capable as a real person could physically be (so 200 IQ Navy Seals are fine), and any magic items a regular party would find along the way are fair game as well.
Could they complete your adventurers, or at least survive all the challenges? If not, where do you think they'd fail?