I’m tempted to say that statism is sort of like a cult. Proponents of socialism and other big-government ideologies have a dogmatic zeal that blinds them to reality.
For instance, no nation has ever become rich with big government. But that doesn’t stop leftists from advocating in favor of higher taxes and more coercive redistribution.
They are equally capable of rationalizing that economic misery in places such as Greece and Venezuela has nothing to do with bad policy, and you can even find a few zealots willing to defend basket cases such as Cuba and North Korea.