If this is true then why do people cite "easier decisions" as one of the reasons that they short-stack?
They have easier decisions on turn and river. Turn is shove/check, and they don't get to the river without full commitment.

The tougher decisions are preflop, like getting 3bet or facing big early 5x opening and not having AA/KK. Those decisions are for smaller mony (at the moment) but it's the key point of hand planning for 50-60bb'er.