It's quite easy to believe a company has much higher quality standards for things it can blame on some other actor that it nominally doesn't control.
Outsourcing blame is fairly common.
Outsourcing blame is fairly common.
How can you screw up just connecting a cable modem to a coax outlet?
Run two lengths of cable connected by a four port adapter, and staple the adapter to the wall a foot above the baseboard because why not, this is only in the middle of someone's dining room.
As soon as he left I disconnected the whole mess and ran a single length of cable along the baseboard, with a right angle connector to keep it flush.