If it was a cash game, I'd do just that, safe in the knowledge that the value bets would even out over time. Trouble is, its a no rebuy tournament (£7.50, nosebleed stuff) and you get plenty of callers for a shove with almost any hand. Lets say I have the best odds
there, AA against random hand, I'm going to win 80% of the time (and I won't be that lucky). I do that, what 3 times and I've degenerated my whole evening to a coinflip. 5 times and I'm 68% to lose on the first level, and thats assuming I get AA each time.
Folding equity really ain't worth much.