Crafting's the same way. Can't tell you how many times I've failed actions (only a 10% chance of failure with steady hand up) many times in a row, effectively botching a good synth.
I also love getting 90-99% quality on an item only to have it NOT HQ, which has happened much more often than getting 10% quality and HQing in spite of the odds.
The Random Number Generator doesn't play fair.