Yes and no. Your post is essentially correct but recall what we learned from Hillary’s Server fiasco.
The Hildebeast had underlings strip the gist of official transmissions from their classified signage and resend to her using private email over WiFi. She defeated the security measures that were in place to protect the classified materials and used her official government status to accomplish it.
Yes, but that had nothing to do with WiFi. The details were likely copied over from the classified network via removable storage (not WiFi), stripped of any relevant markings and sent.