You know that thing in RPGs where you don't want to use that hi potion because you can't buy another even though they're semi-common drops in the world? And you'll NEVER use that elixir because, really, it's too good, you'll use it later?
Imagine every. Single. Action. in battle has that same anxiety to it. And you can't hoard items either, because you have a fairly strict limit. And battles don't drop more items, only coins to buy the most basic actions back, which requires a trip back to town every time. you can get extra big, extra rare items to beat bosses...but they take even MORE space and are even HARDER to part with, but you can't hoard them or you'll run out of space.
It HATES you. The game HATES you and it wants you to suffer.