Because socialism is a faith, a secular faith, of course, not an intellectual activity.
The one thing certified intellectuals of the socialist faith do not do is question their shopworn creed, a creed that blinds them to facts.
They can't face up to the repeated failure of socialism, so they make do by asserting their supposed moral superiority.
They fail at that, too.
Yes, Socialism is their faith and, in America, they worship at the altar of abortion...