While the guy is correct about the intent, his definition of a backdoor is totally wrong. Backdoor's ARE created deliberately, and the US government demand US suppliers put them in US equipment so the US government can spy on everyone.
The Chinese equipment had "bugs" (not backdoors) that allowed remote access to anyone who knew how to exploit them. But as he says, the interface still needs to be exposed to the internet to be accessed remotely, and this is extremely unlikely to occur in normal use anyway.
Two totally different things.
The US policy is purely and simply designed to allow them to keep spying with "approved" US sanctioned equipment, using the backdoors THEY demanded exist.
Bad luck for the US consumers, who now end up with expensive, old tech, with US spy agency sanctioned backdoors.