Is it just me or is heads-up poker just a total crap shoot?

[That guy]

When blinds are rising, doesn't it just come down to who is dealt a good but 2nd best hand (bad luck) and then does the 2nd best hand suck-out or not?

I don't play enough heads-up to know but when I am at the end of online tourneys 1-1, it just seems to come down to AT going all in and AQ/99 calling --- whoever is the lucky one to get dealt AQ when the opponent is also dealt a good but 2nd best hand -- wins.

Is this skillful or a coin-flipping contest??