So is prostitution, but you don't necessarily factor it into a business plan.
I genuinely don't think that management consider that cabin crew fatigue or flight duty limitations have any bearing on safety.
The problem is, 99.9% of the time it doesn't, and that's all the beancounters and management flunkies care about. The 0.01% of the time where it does, the ensuing mayhem proves that it did have a bearing, and the media / distraught rellies have a field day.
Titanic Syndrome in action. Most liferafts never get used... doesn't mean you sail without 'em.
Oh well, more operational voices in the wilderness