The device only gives easy access to already extremely weak/non existent security systems. That's literally it.
It's just something that's existed forever, but put into a convenient package and marketed well enough that suddenly normal people are realising how insecure their electronic systems actually are.
Kinda like how they used to make pacemakers hackable because they never thought to add any security at all. I bet many of them still don't.
Anyway, the issue lies not with this device, which can't "hack" anything with any actual security, the issue is with manufacturers making devices that literally leave the door wide open to anybody with an extremely basic electronic sniffer/cloner device.