Crafters have tested the percentages before and yes, reclaim is actually 90% but you have to have a large enough sample size to confirm that. Everything really does average out so the % you see is accurate. Yes, you can have strings of misses, but I've also seen consecutive crafts where every last HT landed.
The bottom line is that while RNG is present, everyone is subject to the same effects. We all play by the same rules. Some do better than others and that simply boils down to a crafter's own handling of the mechanics.
Does it feel unfair when you 100% a whole bunch of crafts and then suddenly NQ the only two crafts that fell below to 91%? Yes, but it's part of the system. Most of the time, you'll get the HQ and whoever can consistently get 91% will HQ a lot more crafts than the person who only can manage 70%. So your ability as a crafter makes a difference.
The designers have given the player a lot of tools use. Even when crafting 4* from all NQ, there aren't too many situations where I'm at major risk of an NQ. Due to the balance and overpowered gear/abilities in HW, building 11 stacks of IQ is practically a given. I don't fall to 10 IQ too often and rarely fall into the single digits (maybe 1/30+). From all NQ, the only time I really get concerned is when I hit the 6+ miss mark. Missing 4 times does not pose any real problem and 5 misses can go either way (but it's still mostly HQ). The more robust your strategy is, the better you'll be able to mitigate misses.
Start with a moderate amount of quality and you should be fine almost 100% of the time.
