Ask HN: Why are there no profiles on Android browsers?

Smartphones never need a sysadmin because all weird things are either prohibited or so easy to set up that a child can do it, no third option. I am travelling often to my friends and often I use to borrow their laptop/desktop while living in their apartments and the friends always borrow to me their PCs/Macs with ease. But nobody ever borrowed me their phone because every such a device in active use is having so much personal information that everybody is always super-bothered about something might just appear in push notifications and compromise some very personal part of their life to me.