This person has been saying all over the thread that "ovens don't go to 500F" and here finally add the actual caveat "except self cleaning". At least half the ovens listed in Lowes's online inventory list self cleaning as a feature, and it's even a feature in my bargain basement level apartment oven, which happily goes up to 550F, which is great for cooking pizza.

I don't know whether they're being intellectually dishonest, or genuinely don't realize they're spreading useless info.

They're claim that nobody gets a pan hot enough to degrade teflon while cooking is slightly more reasonable, except plenty of recipes start with "heat an empty, dry pan until it is searing hot" and that leaves a lot of room to screw up your pan.