Kevin, while I agree with what you've said here,
I do feel inclined to point out that I personally have hands on experience, at least with the knives I have on hand
.
Of them, I've designed 5 down to the last detail, (single biggest learning experience thus far) had three built to a rough idea of what I wanted, (custom, by definition) picked one or two prefab from makers here on the internet, and purchased several more second hand using the internet- in particular the classifieds here on Bladeforums. That's probably a couple dozen I have in my possession, none of which are junk. Until I make my own, that is

But I'll keep it too!
I don't want to part with any of them. Through whichever media I chose them, they are all still the right decisions for me, some simply because of unbeatable value, some which fulfill my inner desire in what I want that knife to be, to me. In a number of cases, I had to risk trusting the knife maker, and in every instance the maker came through beyond my expectations.
Additionally, because the internet allows one to research a maker and determine their reputation, one can find a maker who represents the approach that fits one the most, and avoid the ones who will take advantage. It takes a lot of time and research, but the info available now has never before been so easy to access. If there is any sort of red flag around any maker's name, they are easy to avoid.
As an accumulator of knives, I can practice my hobby and interest on my own terms, without having to know who's who or caring about who is drawing the biggest crowd. I do it for my own interest, and if it weren't for the internet, I believe that my choices would be extremely limited.
But no man is an island, and I believe that the true value of going to shows is the community aspect, which the internet cannot reproduce. That is real intrinsic value, and I hope that custom knife production and shows which promote this grow and become more commonplace and accessible to more people.