Rather, it's that tplink has security vulnerabilities and those along with all other factors make it a national security threat. Other factors include, how pervasive it is in the market and how actively the Chinese are exploiting these flaws.
And to your point- soho devices are notoriously insecure, tplink especially. If youre not familiar then you simply must take your expert's advice on it.
This is more about preventing the next vpnfilter
They shall start with Cisco then. Or backdoors do not count as "other factors" ?
Because while people are really frustrated with these issues in general, effective reforms require principled regulation (eg anti-trust unbundling of software/hardware, personal data protection) and are directly opposed by the US surveillance industry. So instead people channeled their built-up frustrations into the siren song a fascist demagogue promising to simply make it all better with the snap of his fingers, while he was actually backed by the surveillance industry eager to consolidate its power. So now the battle lines we've gotten are the US surveillance industry pitted against the Chinese surveillance industry, with US citizens losing either way.