Hi Asit,
Optics not only was, but even today is, important. It is not possible to have a bad lens and make amazing photos. I know the importance of clicking the shutter as much as any of friends here may. I started in film era as well (with my father's medium format B&W camera). And I did work in my friend's darkroom (mostly for fun) every time I felt like; to wash my films, make enlargement, or as I said just for fun. So of course I know the importance of clicking the shutter. And even in this digital era, I can proudly say well over 90% of my shots are keepers (I don't think that's a number many people from digital era would achieve).
Wrt to this discussion; I and you seem to be saying the same things, however seem to draw different conclusions. And that's the beauty of life; different individuals see the same picture and draw different conclusions. Isn't that what these forums are all about?
If we go back a little, the discussion was about the
merit and demerit of Prime and Zoom lenses. It was never about good quality and bad quality lenses, unless you implied all Primes have good quality and all Zooms have bad quality, in which case I will have to disagree. In each lens type there are good lenses and bad ones, better ones and worse ones. So lets not mix things up and generalize; to make it a good lens vs a bad lens discussion. Discussion, at least to me, was prime lens vs zoom lens, and remains so. And I sure have presented the merits of zoom lenses which you may or may not have noticed. Because I didn't receive any feedback on that, just some very generic remarks about lens quality and tolerance to post-processing.
Oh, coming to post-processing! Tolerance to post-processing is as big a war among photophiles as cable wars are among audiophiles. We cannot go there without having to have some long winded discussions.
One note on Adobe software processing: To Adobe it doesn't matter what the native software bundled by the manufacturer does. Once Adobe has developed the CODEC for a particular format, it works on everything in its own DNG format anyway. And even if it didn't, things like barrel-distortion correction and vignetting correction have no dependency on native format. You can perform such corrections on any image buffer once loaded.
Wrt, lens correction being controllable/effective, its nothing debatable. You just need to use the software, you will be immediately convinced. The software I named does allow you to remove the distortion in a controlled manner. And whether it has removed the distortion or not can be easily verified, because it isn't some voodoo, it's a measurable thing and one can very well measure it and conclude with assurance.
You seem to have somewhat a loose definition for yourself wrt post-processing. For example: you don't seem to consider cropping as post-processing. I would consider that as post-processing. More so than lens-correction. Why? Because, it means your composition wasn't correct. Most important thing in photography (on the human skill side) is composition. And if you need to crop it means your composition wasn't perfect. Think of it like this. Will you be able to crop so easily in film days? Anything that you will not be able to do easily in film days is post-processing, isn't it. Again this is an entirely different debate what is post-processing and what isn't. Like I said, its a big debate.
Regards.
PS: The incident about 18-55 to 35mm was a bit unusual. If buying a prime lens can turn someone into a good photographer, 35mm lens would be a hot-seller

IMO the problem might have been in his holding technique. Coming from P&S background many people have shaky hands, which causes blurred images. I can't think of anything else. It would help to know what was lacking in his previous photos and what did the 35 mm lens change. Unless we do that, it isn't right to draw the conclusion that lens turned him into a good photographer.
I am surely happy with discussion. If nothing else, it is going to help future readers of this thread.