Beyond the valid reasons in the sibling comment (e.g. not accessing personal email on a work device), it is also a security risk. Access to your email is typica

Beyond the valid reasons in the sibling comment (e.g. not accessing personal email on a work device), it is also a security risk. Access to your email is typically sufficient to gain access to everything else. I use an email for accounts that syncs with my phone only, and I lock it down tight.