In MTTs (excluding freerolls), I seldom see anyone all in with worse than an ace unless at a truly desperate situation with just 1 or 2 BB left. Even when the villain has just 3 BB, and I call with K and another high card, I mostly ended up as the dog.
If other players are not jamming as wide, as they are supposed to, then the adjustment is to call with a stronger range.
The result was that the risk was much higher than the chart suggests, because I am risking my whole stack to someone holding an ace or a pair, in order just to steal the blinds
If you are "stealing the blinds", then per definition you are the first player to move all-in. And if people are only calling you with an ace or a pair, that means, they are probably folding to much (depending on stack size and positions), and this mean, you should jam even wider, that the charts suggest, because then you have more fold equity.
Its fully expected, than when we jam anything but premium hands and get action, then we are usually behind. But this is compensated by the times, we get no action and pick up the blinds and antes uncontested. It can not be true at the same time, that people only call you with very strong hands and never fold.
So it sounds like, you are focusing to much on avoiding the unpleasant feeling of busting from the tournament and try to delay this outcome by folding hands, you are supposed to move all-in with. But this is a fundamental misunderstanding, since the whole point of a tournament is to bust everyone, until someone have won all the chips. So its not a problem to bust, and we do not want to delay the time, we bust, if this mean blinding out and reducing our chance to make a deep run in the tournament.
and until I reach a late position or the blinds, there is a high likelihood that someone behind me would have an ace and call my shove.
Obviously a jamming range from UGT is not as wide as a jamming range from BTN or SB, because as you say, there are more players behind, who might wake up with a hand. But if you are 10BB deep it usually still involve all suited broadways and most pairs. And if you jam


and get called by


,then you still have around 40% chance to win, so its not like, this is some kind of huge disaster. You just need to get past this idea, that its very important to survive another hand or another orbit. Its not as long as your final hand was played correctly.