There're key differences between Half Off and other heavily luck-based games: there are no other pricing games, besides Half Off, that offer such high odds of winning absolutely nothing* despite doing absolutely everything right. Sure, you can win nothing in Joker doing absolutely everything right, but the odds of that are only 20%, compared with 50% for Half Off. And in games like Pass the Buck, you may only have the same 50% shot of winning the car with perfect pricing, but the odds of winning something, period, are considerably higher, car or not. It may not be the only game with low odds of winning, and it may not be the only game where you can win nothing**, but really, what other games combine both elements? It's the combination of the two that some of us find a little bit unsettling.
*Not counting SPs.
**It may be possible in Plinko, but it's also ridiculously unlikely.