Even with the Mac there are still security reasons to enforce certain controls on it. eg. if you lose it and it's not encrypted, doesn't have strong login cred

Even with the Mac there are still security reasons to enforce certain controls on it. eg. if you lose it and it's not encrypted, doesn't have strong login creds required, lock screens, etc then all the data on it is out in the world. That can include customer data, access to your production systems, your companies code and ability to check it in and introduce other bad behavior in the product, etc. Some of the other controls will be able access to internal systems. eg. VPNs, or cert-base auth controls other make sure that only employees can access those systems to protect them. If you're on an uncontrolled machine you lose the ability to guard who and what is connecting. Some of the controls protect employees themselves. MDM on your laptop allows IT to reset your password and/or fix your machine in other ways. I'm all for switching to macOS, but they still need the same controls in place.