Ok.. Ill put my neck on the block here.
But just tell me something.
Why is it that someone who wishes to learn photography or step up to a "better" camera shouldn't start with a medium or Large Format.
Granted the film cost, but all in all, a MF or LF set up to start in many instances is far cheaper for equipment, and forces a person to learn the process and be more specific on their shots.
You are making an assumption (ass-u-me) on cost. Film camera are thought to be cheaper because of all the used gear out there. But most of that used gear is 30+ years old and needs a CLA to be brought back in shape. The foam on my old SLR is literally falling apart. And 40 year old dried grease/lube means your shutter speeds are probably not accurate.
The cost of the CLA will kill your "cheaper" argument. Here is are prices from one shop's web site.
Hasselblad lens Overhaul = $185 + parts
Hasselblad 500c and 500cm overhaul = $175 + parts
Mamiya RB and Rolleiflex prices are not much different.
So your cheap Hasselblad or Mamiya RB will cost you an additional $360+ to CLA/overhaul the body and lens.
Copal Shutter Overhaul (LF shutter) = $95-150 + parts
And a 30+ year old LF bellows is likely to have pin holes in the corners of the bellows, so budget a $$$ bellows replacement.
If you use a dSLR in full manual mode, I see little difference than using a MF or LF camera, to learn exposure.
You have to understand and use shutter speed, aperture and film selection/ISO level.