That is true. I would think you'd have better luck going through a retailer. We will not allow our customers to do it though. I'm not doing a service call to a customer for $15 when they installed it themselves. I don't feel that dish should either.
Have never had a service call. Have always fixed whatever needed fixing myself. Have done diagnostics over the phone with Advanced Tech Support in the past and Dish then would send needed replacement equipment for what had failed. I do pay the $6 monthly service fee. I just insist on doing everything myself. That is why I am on this site to stay current.