there is a difference between the consular services that issue the visa and the immigration group. Just because you can get the visa easy with soft power doesn't mean immigration wants you here if you aren't continuing soft power activities.
in general true, I even used a photo in my phone once when my passport was out for an extension. But can be tricky and uncomfortable trying that without one.
Anonymous participant yeah I realized you should get it back tomorrow but figured I'd leave a comment anyway in case someone else gets stuck like that without a passport.