You have to completely stop caffeine, best to cut nicotine too. It's worth it. Watch out for caffeine In cola etc.
Recently, I started using an app to track my caffeine consumption during a day (there are a bunch of those in the stores), and even though I haven't stopped drinking coffee and not planning to, I'm trying to stay within a reasonable limit and switch to decaf if I'm close to it.
You are rarity/have sheltered kid well. ( Have met some families where kids never had fast food, sweets, like rod and todd Flanders in the Simpsons lol)
I'm on West coast, kids in elementary school, and half the bday parties in the lower grades families serving mini cans of coke for the kids (and juice with just as much sugar, pick your poison).
Goto any fast food joint/mcd and see 5yr olds with a soda.
I have traveled throughout Canada to east coast and kids love soda pop/coke too.
Not all kids like soda, many do. Not all parents allow their kids to regularly have side, but may give as a special treat.
More and more kids are drinking coffee due to Starbucks type drinks, but that's mostly just sugar.
My background is that as the poster above, I have always been a night owl, with the ability to function and wake up earlier if I need to.
For years I have tried to change it because of beliefs like yours that it was "worth it". Whenever I tried to change it I would feel unergetic, crappy and unmotivated. I would stumble on words and have terrible sleep. Yes, I tried to stop caffeine, use candle light only, ton of supplements. Nothing worked.
Since then I have accepted I'm a night owl, and I should embrace it. I have never felt better since the day I have decided to stop fighting it.
The 6AM hustle seems amazing in theory but at the end of the day we all only got 24 hours.