Rare doesn't mean acceptable. It happened more than a small handful of times and was deeply unfair, particularly since it tended to happen to people that were

Rare doesn't mean acceptable. It happened more than a small handful of times and was deeply unfair, particularly since it tended to happen to people that were deeply in need of coverage at the time - which by itself is a rare event when compared to how many people are living healthy day-to-day lives. Besides, while rescission was rare, annual maximums and lifetime maximums were not. Bumping up against those maximums (now illegal) was rare, but see above - they happened at the worst times, oftentimes to people who weren't expecting it.