It's vendor lock-in (or DRM), not security. Security would be a protocol based on a user specific secret that doesn't inherently require locking down anything to Bambu Lab only software (think username/password). Vendor lock-in is about locking the user into using Bambu Lab software, which is what we see here.

You would never allow your bank account to be secured with something akin to Bambu Lab's "security fix".