No, not really. "Casting" through the netflix app basically just turns your phone into a remote for your TV. The TV still plays videos from Netflix directly, using the Netflix app (or website). Casting using Google or Apple's solution casts to a proprietary device with all the content protections functional, just like using the app on those devices.

The content protections are bypassed way easier on a computer by using the website and some black magic. The removal/paywalling of casting is purely removing convenience from the user that had barely any financial impact on the company.