That would conflict with laws that protect your PII/PHI. Are you okay with a doctor saving your health information onto their personal cell phone? Or a bank teller with access to move money between accounts able to do so from their cell phone at a bar while drunk? Or a plastic surgeon posting photos of their patients to social media without their consent?
Corporations suck, but people also suck. Even if there’s no malice intended, the average person is bad at personal security and can’t really be trusted to protect data that the corporation is legally responsible for protecting.
We should not forfeit our right to privacy
My point from before was that if you want privacy, don’t use a device that you don’t own. If you’re doing something not work related, use your own device and don’t use the corporate wifi.