Very interesting. I too have been a Dish customer for over 10 years, and never once did I have a Dish rep ask for these numbers except when it was obviously needed, e.g. trouble with a receiver.
What number did you call? Maybe it wasn't Dish at all.
I called 800-823-4929.
The rep additionally advised he could not speak with me unless I was calling from my home phone number. I advised him while our home phone was still active, it's only hooked up to our burglar alarm. We don't have a telephone anymore to even plug in. That number has been forwarded to my cell phone for 9 years.
It's ludicrous.