A disproven orthodoxy can still reign supreme. Take the Catholic Church post-enlightenment to the mid 20th-century for example. Just because an orthodoxy fails and falters doesn't mean that it will fade away. There isn't an equivalent of atheism for economics - there are no "aneoliberals" or "aeconomicists".

Anyone who declared themselves "aeconomicist" would be ridiculed. That reaction should give anyone pause though. Ridicule is a powerful reality-maintenance mechanism. Economics is an extremely powerful reality-creating assemblage. Attempts beyond descriptive are met with intense skepticism and cynicism. Even here, in purported a bastion of competing ideas, normative economics are routinely lambasted.

The most common reality-maintenance mechanism is the reflexive "come up with a better idea then" response. It serves as a means of shutting down all discourse which ends up being antithetical and ultimately hypocritical to the mingling of ideas and curious questioning we claim to adhere to. The end result is implicit support for the status quo. Even if that isn't what is typically intended, it is functionally equivalent.