You're comparing apples to oranges. Lawyer speak? Dollars to donuts the maintenance instructions were written by an engineer, not a lawyer. Probably because the manufacturer of the chain has zero liability in how you use it. Why wouldn't the manufacturer want you to get at least the expected life out of their product? If I buy a chain and follow the care instructions and it only lasts 1200 miles, I'm not buying a chain from them again. your way seems to work. Maybe because it keeps the chain so clean and keeps moisture out of it. Dirt is a big enemy to a chain and will cause it to wear faster. As far as 350 miles per ride, good for you. Some of us commute on our bikes. Some don't put in 350 miles a day. I'd rather clean and lube every 500 or so (which takes me a few weeks) than spritz it down with hillbilly juice after every ride. It works for me and it's what the manufacturer suggests. I'll do me, you do you. As far as advice for younger riders, as long as they're doing SOMETHING to the chain it's better than nothing, be it wd40, motor oil, chain wax or whatever.