Always found it odd that Apple don't let you have a second separate business profile to switch your phone to for work - especially when you don't necessarily want to be bringing browser history/personal apps into your workplace or wifi. Having your iphone locked to your personal account also hobbles their continuity features if you work on a business computer with its own work account (as most businesses do).
Facebook is equally bad on this front - requiring you to use your personal account to administrate business pages (don't even get me started on how they forced large businesses to use a custom 2FA method they then phased out - locking people out of their personal accounts forever).