Because I'll be more concerned if the NTP pool providers say "This is detrimental to our services" than if a random 3rd party blog (that has apparently not even checked their math) says I should worry about it.
Notably, they are ignoring the ones that make it possible for NTP to be aware of the problem in the first place. Right now, TP-link's traffic probably just looks like millions of unrelated devices misconfigured. NTP wants vendors like this to make requests to a particular subdomain so they can identify problematic vendors in the first place.
