I’m in agreement with Adam Steffes. I don’t limit it to dealers. Most shops. Not to say there are not some good ones, but I’ve not found them when I needed them unfortunately. Literally, everytime there was an issue. Even the time I was ill and had the wife pay to get the oil changed. Only oil change where I paid to have it done in my life, and they cross threaded the drain plug and sent it home with her leaking oil. I bought a new 21ft Ranger back in 2012 from Cabelas. What a s*%$ show that was. Only some of the addons were present when I picked it up. And then the quality issues from the manufacturer. I literally found a trash bin under one of the covers on the port side while installing wiring for electronic equipment. Empty bottles, paper towels, misc trash and even a couple cigarette butts. That, I surmise, was done at the factory. The list of issues with the dealer and the manufacturer are way too long to list, but include improper wiring, livewell/pump plumbing hooked up way wrong, star cracking in gel coat due to improper installation of the bump rail and ladder, trailer set up wrong in several regards including one of the trailing arms off two splines and one off one spline (tandem axle, so they got it 50% correct, which I figured out after noticing crazy tire wear problems). After one unsatisfactory trip back to the dealer, I refused to take it back and finished/fixed it all myself. Installed all of the snaps on my full enclosure (drilled a ton of holes in my glass), but I was not about to let them do it after they installed several components out of alignment (gunwale rails were a mess). No regrets in doing that given the shoddy work I was dealing with as the alternative. I could go on and on with all of the dealer/shop horror stories that have rendered me as my own service provider for pretty much everything.
To the original question, I see that as frustrating for sure but fairly minor compared to what I’ve seen with new boats over the years. Run a new cable and done. Personally, I would get them to pay me to run the wire which would save them money and give me comfort knowing it was done right (just give me the materials at no cost and we’re good). Just don’t touch my boat, please.