Just wondering... 10x bb your stack is short?
200 bb you have 2000 chips...
Chips = power = options
At 10 bb's you generally have enough chips to hurt a player if he calls, so shoving makes a win without ever seeing the flop more probable. You have fold
equity, because people with better
hands are apt to fold.
Let's say you had 10 bb's fold a few more rounds. Now you're down to 5 or 6 bb's. At this point people will call you with just about anything. Likewise, you can't afford to lose any more chips so you'll have to make a move.
If you double, well, you only have 10 bb's again. Big whoop. A few rounds without lucky cards and you are impotent again.
Now, let's say that you shove with 10 bb's instead with an iffy hand (T/J), and get called by a better hand (A/7), so you're only 45% to win. Well, if you win you'll be at around 23 bb's (depending on antes and such) and can fold ten rounds in a row waiting for a good hand before you're at that "desperate" 10 bb place again. And for all of those 10 hands you have substantiall more chips (more power).
That is a very good position to be in, and well worth going in as an underdog.
So, for 5% less than a coin flip you get to see twice as many hands, and have more chips (more power) during those hands.