90% of the internet would die in the first level because they're too fat to run away from the monsters and even then after they got their first gun, they've all learned how to shoot from playing Call of Duty so they'd waste all their ammo in five seconds shooting at a wall because IRL, there's no auto-lock-on and then get eaten. That's the answer to nearly every "would you survive X videogame world" thread.
*hears the sound of the morbidly obese furiously summoning the mods* Fiiiiine... I'll be constructive.
The challenge of Silent Hill is mostly a psychological one; the town brings your worst memories to life to haunt you. So in that sense, your own self-loathing becomes your enemy.
(If you haven't already guessed, I'm going off silent hill 2 and 3 because the other sequels are shit and should be deemed non-canon)
"Can you conquer your own demons?", I guess, is the question of whether or not you'd stand a chance.
I think I could, but that may just be the overconfidence bias talking.
I can, at least, say that I could withstand the psychological impact of seeing the monsters since most look strangely like the cadavers I'm so used to working on.