"Cleaning ruins more guns than neglect."
Probably true.
"...proper cleaning won't ruin a gun."
Mostly true.
"Some barrels get dirtier faster than others."
True.
"Cleaning wears out a gun faster than shooting."
Sometimes true, but not always. Some barrels are shot-out faster than others.
"People destroy crowns with cheap rods, which kills accuracy. The cheap rods also flex, which hurts the rifling. And if they don't use a bore guide, that sucks too."
All true.
"Of course there are better things than cleaning rods."
What, bore snakes? They can get impregnated with metal shavings over time and do as much damage as cheap rods, maybe more.
"...don't use a cheap rod; mine are coated."
Coated rods can get impregnated like bore snakes, so can still cause damage. Quality, uncoated stiff rods with a bore guide are safer IME.
"in fact, don't use any brushes at all."
False. Doesn't hurt if nylon, or even phospherous bronze if used properly.