The Canadiens have no intention of trading him, but in Los Angeles, they believe his value would be much lower.
This trade offer is practically insulting. Yes, I'd like to give Kaliyev a chance in Montreal, and yes, he has interesting potential, but he doesn't have the value of Arber, not even close.
Moreover, comparing him to Joel Edmundson in terms of role is nonsense. Edmundson is an honest defenseman, but never as good as Arber, and less tough due to his back injuries.