What. Learn to read, really. I say "People who won't spend $60, but are willing to spend $30 won't buy it for $60, so there's no profit in stopping resales", you say "Oh, so you say nobody wants to spend $60 on this". Yes, I know that people who are willing to spend their $60 exist, but they don't enter this equation at all - we're talking about "does stopping resell increase profits", remember?
So where exactly does re-seller profit come from? From what I know your numbers are completely off base. GameStop does not re-sell game with 0 margin. They will buy a game for $30 only if they can turn it around and sell for $50. So we have somebody who wants a game for $30 and somebody who is fine with $50. A developer would have discounted to $50 first, got $50 sale, then discounted to $30 - got $30 sale, total $80 vs $60 he is getting now. The actual profit is even more because somebody who buys a $60 game on the release date with intention to re-sell it for $30 might not be comfortable with waiting several months till discounts will reach $30 and is likely to spend $60 or wait much less for a smaller discount, say $50.
Nope, the point you countered is "everyone, no matter how shitty or skilled, is doing fine". There are failures in every business, especially when trading in such volatile market as VG, just pointing at them doesn't prove that the industry is doomed unless they squeeze the customer for every cent available.
There are failures in every business but when the failures increase the business has to adapt or perish.