If that is so, it's completely unreasonable.Copal were still making leaf shutters until 2013, so one must assume the ability is there somewhere. I would hazard a guess that a 120 folder might be easier than a 35mm SLR but that's going to be a very small market, surely? Most of the photography students and people aspiring to do something other than lomography are looking for an SLR.
Thinking of Lomography, does any of their cameras have decent shutters with multiple speeds and apertures? I guess Seagull are still making TLRs. So a leaf shutter camera is not impossible.
Such a camera would have nothing to do with Lomography. It would be a absolutely the same IQ as other high quality folders.
A magnetic actuator (voice coil?) leaf shutter in a high quality 3.5 lens with aspherical plastic elements in the middle, perhaps even exchangeable with a "lens board" type construction, would be every bit as good to learn on and use, as a professional or ambitious amateur as a 135mm SLR.