i think we're just thinking on different timelines. i would never advocate "shutting the doors of learning" in any sense of the phrase, but i think prioritizing is important. i mentioned the chef analogy because i think it's safe to say that becoming a world class chef will certainly improve the abilities of a food photographer. however, such an endeavor is a lifelong commitment and if the person's goal is to become the greatest food photographer out there, i think careful study of the final presented dishes themselves may garner results more effectively. if you are first and foremost a photographer, dedicating your life to becoming a chef is not the most efficient way to improve your skills.
as for photography, large format techniques are not fully applicable to every niche of the craft as a whole. yes, we are working with shutter speeds and apertures, but if your chosen focus is on work that involves learning the delicacies of extremely wide apertures and fast shutter speeds, dedicating years into learning how an image reacts to a different format size, apertures that creating massive amounts of DOF and shutter speeds that reflect the fact that you're always on a tripod.. it's simply not the same. if i had spent my time using a view camera the last few years, i would not be so well versed in the use of my f/1.2 lenses and all of the techniques to hand hold steadily at slow shutter speeds. they are the same form of art in the fact that it is all photography, but they are vastly different in real world use.
at the end of the day though, i would love to learn how to use a view camera and i have no doubt that it will make me a better photographer. however, i don't think this sort of advice is applicable until you have a solid foundation in your own focused area of study first. you cannot study 4x5 technique to learn 35mm skills as well as studying 35mm techniques would be for learning 35mm skills. it's not closed mindedness, it's just knowing how to prioritize. it's learning how to walk before you run.
I would also disagree with this to a degree. Its an aperture, a shutter a lens and a box. Learn to control those things yourself instead of relying on the camera to do it for you and your almost there no matter if its medium format, large format of 35mm. But again I don't think I said you should do it all, all at once. In fact I just said and have continued to say if you learn it you will be better for it.
I would agree its probably a bit easier if you start with a smaller camera shooting all manual before you go to a view camera just to get an understanding of aperture, shutter speed, ISO etc. But you can do that with a digital camera or any camera you can use in an all manual mode. Get acclimated to the shutter,aperture operation then I say dive in.
Oh and you would be rally supprised in what area knowledge of something that you thought at one time would be usuless to you and what you do can save your butt
I shoot all the time, if you know my work, in low light with very fast lenses and I can tell you many of the skills I learned on large format have helped me. Framing and proper exposure and what to meter to get the proper exposure. I shoot at 3200 all the time in fact I just posted some stuff I shot Sat evening at 3200 and my 200 2L wide open which has a shallower DOF when at MFD than the 85L at 1.2 at the same distance which I also shoot wide open or near wide open all the time.
The thing about knowledge is its usually never confined to what you think its going to be confined to. It can open the world up to all kinds of possibilities that may not have ever entered into the though process.

NO it wasn't.
