Spoiler alert, RPGs are kinda ridiculous. Most games are, of course. While the Mythbusters may have shown that carrying Doomguy’s loadout into battle isn’t as bad as it might sound, there’s a reason they’ve never done a follow-up about doing it after taking a few rockets to the face. Likewise, we can’t know the effect of glugging down fifty health potions a day, but it must mean a lot of pauses for the heroic knight to hurriedly get his armour off for a quick pee-break.
Like a lot of things, there’s a line here – on one side, things that are interesting to see a game justify, and on the other, things that are probably best handwaved. Where does that line lie?