Moving modem/router to another room in my house

So, I'd like to move my modem/router to another room of the house for better connectivity where it's needed. My ISP (Spectrum) when I asked about it, stated, and I quote "We typically only activate a single outlet so that the signal doesn't leak out of unused cables, which would negatively impact your service. We can have a technician come out to activate the new outlet. The charge for the visit would be $65. We only activate one outlet that way the active has a stronger signal". Is this BS? Can I just move it without having to go through that?