Calling an all-in and going all-in are two totally different things, unless the all-in (that you'd be calling) is for an amount greater than you have. Otherwise, it's just "bet a lot, but you can keep trying if you lose". Going all in, on the other hand, is "bet it all, and if you lose you're done". The risk on the later is much greater. Any time there is no chance for recovery on failure, your risk analysis changes dramatically.
But in a cash game, if you're properly bankrolled (a common number people recommend is to have at least 40 buy-ins worth of cash set aside for the stakes you're playing), the one buy-in you lose if you lose an all-in is relatively small and you can just buy in again and keep playing. Going back to what OP said, if you shove every time you get aces you will profit over time as long as you have a properly managed bankroll, it's just not the most profitable way to play aces in most situations. It's different in tournaments because when you're late enough into a tournament, losing your stack actually does mean losing everything since you can't re-buy
