Most people don’t have a “sleep problem,” they have a lifestyle they refuse to fix.
You can’t doomscroll till 1am, slam caffeine all day, avoid sunlight, never move your body… and then blame your brain for not shutting off on command.
Sleep isn’t broken. Your habits are.
You should not anticipate anything being "bulletproofed" or "fixed".
We're not toilets; we're sophisticated adaptive systems. An intervention may work well one day and not work well the next.