No, not exactly.
Killua, as the wishmaker, is free from any responsibility or penalty that would come from making the wish. He orders the dinner, but it's the cooks who make the food, and the next person who has to pay the bill. He's not involved in the process in the same way. We've already been told that the person who makes the wish doesn't have to pay the price of the pestering, Killua makes the wish, but he doesn't have to pay. (He MAY however have to deal indirectly with the consequences of the next three HUGE pesterings).
I am sorry if my words weren't clear, I meant that from your theory gon would be in danger because he was part of the wish being granted.And thus killua would have to look out for the next wish as well.
If Alluka's ability summons this super nen remover that can cure Gon, it's the nen remover that physically makes the removal happen. The nen-remover is the one at danger in my theory, and everyone involved in getting that nen-remover there - the number of which, if it's a big wish, increases proportional to the wish if the equivalent exchange of the pesterings are ignored. I feel like the 67 people involved died in this case only because the person who refused the pesterings was connected to the wish already, via her lover.
Although what we've seen from her abilities so far points towards this scenario being true, I cant figure out why togashi would go down this way when killua could in fact find such a nen eraser far more easily without the risk of those three pesterings attached. From the way the chapter says that she can make any wish happen, I am personally inclining towards her healing him through something other than a nen eraser. We did see such a "deus ex" if you would call it that , with the archangel's breath.We'll just have to wait and see I guess