Meno I felt the reasons given weren’t enough to explain the attitude.
What I think about the reasons:
It’s illeagal: that just make it impposible to carry out. It doesn’t make it a bad idea theoretically (And does anyone what the background for this law? Why was it necessery to make it?)
Dangerous: If there is an emergency you could use the landline. Some people have big homes. Do they carry their phone with them around the house in case there is an emergency?
I just think it’s ok to have it. I’m not saying every beit kneset should have it.