I disagree. The author makes it clear they're referring to the added weakness of having a device charge via a non-secure port as compared to the inherent insecu

I disagree. The author makes it clear they're referring to the added weakness of having a device charge via a non-secure port as compared to the inherent insecurity of USB ports. The added vulnerability is based on the ease at which people will plug in a strangers power cable compared to plugging in a strangers USB stick.