Perhaps because they see that particular strain of neo-classical as a dilution of classical composition. Manticora is pretty cool, especially if you think Blind Guardian lost it after IFTOS or before. I find unintentional cheese more amusing than the deliberate tastelessness of someone like Hammerfall, though I still think power metal is cheesier, if only because those emasculated choir vocals and terrible English inflections make the words inescapable.