If you are logged in on a device, then somoene can see all your emails. Is the history of all your searches more sensitive than your emails? Perhaps, but it's n

If you are logged in on a device, then somoene can see all your emails. Is the history of all your searches more sensitive than your emails? Perhaps, but it's not 100% obvious where to draw the line. The main determinant is probably that people check their history legitimately so rarely that re-auth is a small burden.