Moreover, "heresy" implies that a person becomes heretic - socially despicable - by embracing an idea. This is what the author opposes. And for good reason - embracing the concept of heresy means you're only allowed to think things sanctioned by the current sociopolitical philosophy. And since every society has some amount of batshit insane ideas it believes, allowing for heresy means cutting out the safest / most peaceful way of correcting that insanity.