No. I don't think new tech divers should be dealing with narcosis and CO2 on top of already being task loaded with new skills during a course.
I believe if you can't get a suitable gas for a dive, then you don't make that dive. That line may get blurred later with a lot of experience to back up the skills, but not when they are new to everything and taking their first technical course.
So poor folks in third world countries should just not get into technical diving EVEN when agency standards allow for such training?