a) "If 1 million people say a stupid thing, it is still a stupid thing." This applies here. His "peers" were clearly wrong.
b) The argument for using "Cy Young voting" is not to see what his peers said about him, but to distinguish high-quality seasons. Clearly, if the voting itself is wrong, then this doesn't hold up. Just look at the ERA+ of Blyleven versus Glavine. Very similar.
c) The wins argument is clearly flawed. Do you pick your WIS teams based on wins? Run support and defense clearly play a huge role in this. Glavine clearly pitched on better teams (granted, part of this was their pitching staff, but the defense/hitting on his teams were better as well).
d) "They essentially started the same amount of games and have the same ERA+ for their career. The only thing Blyleven did better was strike people out." So at worst, they are about even. One argument for Blyleven is that by striking more people out, he actually contributed more to his success whereas Glavine relied on his defense behind him.