I'm sorry about your problems. This is the Flubaroo forum and I think you need to take this topic up with the Google Forms folks.
Are the students prevented from using the Print function in the browser? If not, they can print a copy of the Form and save it to their Google Drive.
Unless the quiz is broken into lots of sections, I find it very easy to Print a copy of the Form. Maybe the folks making this decision are over-reacting to a problem that can only be partially fixed with the change to Forms.
You could have the questions be Q1, Q2 etc and project the real question on a screen so the full questions are never shared in digital form but that has a lot of problems also.
I have never been a teacher but have been a part of this forum for a couple of years. I have yet to discover a full proof method to prevent cheating.
I suspect some students do a search for the correct answer. There should be few spelling errors with the help of spelllll checkkker.
I hope your district can find an acceptable solution. Please share the solution if there is one.