I wrote an article on this phenomenon in backgammon. The title was "Unbiased Nonsense." Basically, if you are adding up the results of 100 tournaments, it is ok for the value given to a few tournaments to be greater than first prize, or less than losing the buy-in, even though those seem not to make sense. If you "correct" these, then you actually introduce a bias so that your adjusted results might no longer converge to your skill advantage. This is a worse problem than getting a silly-seeming result for one tournament, so it is reasonable to accept the luck adjustment.
Imagine that you play a freezeout starting with 2 chips each, and take a coin flip for 1 chip at a time. The all-in luck-adjustment lets you factor out some of the luck, when you lead 3:1 or trail 1:3, but ignores the luck when you are tied 2:2. So, the sequence win-win gets adjusted from 100% wins to 75% wins, since the second win is visible and the luck from winning is factored out. The sequence win-lose-win-lose-win-win gets adjusted from 100% to 125% wins because the luck adjustment sees that you had 2 losses and 1 win while you were all-in, which appears unlucky by 25%. The luck adjustment cancels this bad luck by adding 25% to the result of 100%. The all-in luck adjustment overlooks the 75% luck you had while not all-in.
Over all, adjusting for part of the luck in an unbiased fashion is better than not adjusting, even if it sometimes produces some odd results. Even though the adjusted results for a particular tournament can be outside the reasonable range, the overall variation in the adjusted results should be significantly smaller than in the unadjusted results. It takes fewer tournaments to estimate your ROI within 5% if you use the adjusted results.