Are heads up tournaments profitable?

[Colombo]

I do these very frequently, pay a buy in and get 1k chips, winner win 2x the buy in. Although I am usually very sucessfull at these, I'm beginning to think that luck is such an important factor in these. Maybe because I play at paradise where the blinds go up every 10 hands to 100/200 and you start with 1k. It seems that one bad beat, especially in the bigger blind levels, or a run of dry cards in 100/200 is pretty much a guaranteed loss. Are these things really that profitable in the long run?