preaching to the choir, everyone wants sleep
Out of all the health problems one might have, improving sleep is the easiest to fix with the biggest immediate benefits. Further, many issues people claim to have with sleep are self-inflicted, excuses, or solvable.
When you improve your sleep, you're not missing out on pleasures in a way a strict diet may rob you of the goodies in life. You don't sacrifice anything with better sleep.
Tell it to all the insomniacs.
… when the sleep problem is internal. Dependents with their own sleep problems are not often dealt with easily.