Heads up in tourney is not same like normal heads up. The blinds can get so high so it just becomes a shoving game. Unless both have equal chips but thats rare. Yes, great poll indeed.
I disagree.
Hyper turbo HUSNGs start at 25bb on most sites, and there is plenty of edge to do things other than "shove or fold" all the way down to about 7bbs.
Most of the time at the end of a tourney, heads up, the smallest stack is above 7bbs.
And when it's not, that means you were playing 3 or 4 handed with stacks greater than 7bbs, where your postflop skills developed in heads up play absolutely come into play. Your short stack skills in general developed in hyper turbos would come into play.
Shove or fold also has some skill. Many people just hit nash or sage type advice. That's not going to result in maximizing your profit. Many players will call too tight in shove or fold (which means a shoving range wider than nash is best to maximize your profit). Many will open shove tighter than nash, which means a range somewhat tighter than nash recommends can be correct.
And the biggest mistakes, many think that 10-15bb deep you should just shove or fold. That couldn't be further from the truth, and results in a lot of missed profit potential.
End game is serious business, you can make a lot of money just improving your edge a little bit, whether at the end of a tournament when you're heads up (difference between 1st and 2nd means so much money is on the line, even small edge differences leads to a much different profit rate), or in a HUSNG (if you play those, and improve your game a little bit, that little edge per short game adds up very fast and makes you a lot more money per hour/week/month).
