Your attitude on the differences between cash and tournaments is really common, but totally false.

Cash equity in the early stages of a tournament is directly proportional to the number of chips you have. That means if you have, say, .78% of the total chips in play, then in terms of long term equity, they are worth .78% of the prize pool. If you have 1.56% of the chips in play, you are "entitled" to 1.56% of the prize pool. Notice how when you doubled up your stack, it's monetary value also doubled.

THIS IS THE EXACT SAME AS CASH GAMES

If you fold 52s in a tournament because you are interested in conserving chips, you should fold it in a cash game because you are interested in conserving money. They are one and the same.

The main difference between tournaments and cash games is the stack sizes. If 52s should be a call here but not in tourneys (WHICH IS NOT TRUE, CALLING STILL SUCKS BALLS) it's not because you need to conserve your tournament chips, but because the stacks at the table are likely not deep enough to grant you appropiate implied odds on flopping a monster.

In conclusion,
a) if a decision is +EV in a cash game, it is +EV in a tournament.
b) calling a raise with 52s sucks.