Well, er, yes, that’s how poker works. Your hand wins, unless someone else makes a better hand. You can even win a pair of 2s. Or High Card. Unless someone beats you.
In an all-in situation, it’s a 5-card game, and you don’t know who the best hand is (usually) until the River. The only luck is in who stays in the hand with you to make what could be the better hand, which is determined entirely by the ordering of the shuffled deck.
It takes a lot of the decision making out of the game (do I play or fold? Do I bet or don’t I? How much do I bet?) The only decision making left at that point is in the other players, to call or not. And they don’t have enough information to make the right call. Before the flop is the hardest time to decide this, and they’re going to be wrong a fair bit of the time.
If you’re a bad enough player, automatically picking the same answer might well do you better than you otherwise would.
If you’re wrong the first time, you’re out. If you’re right the first time, you get a 1-mistake buffer on the next time. And so on, as long as you keep winning, eliminating someone else.
If everyone folds, you don’t risk anything but you gain only the blinds. But you also risk that someone might not fold because they’re holding a premium hand, and then you take a big loss, or possibly eliminated if it’s the first hand. I’d assume about half the time, you’re out in the first hand, the rest of the time you may last a while.
I still think you’re very vulnerable to someone who is patient and knows when it’s a good time to call. The only way to beat them is if they never get a good time to call, or doesn’t get a good time to call until your stack dominates theirs. Even then, they can still beat you in successive hands if they’re patient enough. I do this heads-up when I need to, and my success rate is better than the stack ratios when I’m dominated, so I must be doing something well.
So until I’m proven wrong, my thinking on this is that if you’re not a good player, this is a good strategy since it’s better than beating yourself through poor decision making, but that you’re vulnerable to a good player who knows how to play heads-up, and knows when to call and when to shove.