It's about insurance, certification of personnel, often these technicians are a cartel in an of themselves.

Everybody loves the idea of cheaper stuff, but nobody is going to take a chance. Medicine is extremely conservative. Overly in my opinion.

You need a specialist to understand an MRI image. Maybe software will advance enough to change this, but it will be a slow progress. Also, carterls are definitely a thing. Radiologists will fight the software part.