I believe that excuse gets many jobs blown off. "Sir/Mam I'm going to have to drill holes everywhere and wrap your house because you have unapproved cable"
We've seen a lot of their 'work' and it ain't pretty.
We replace cable whenever it's necessary but at least we do a nice neat job. We see 'their' jobs with cables running off the roof, over the gutter and down the middle of a wall all the time when it could have easily been routed to the corner of the house and down behind the siding where you wouldn't even see it, as an example. People call us all the time to come 'clean up their mess'.