Because they don't want to be labeled as a 'conspiracy theorist.' As confident in libertarian theory as they may be, as confident in their ability to voice it as they may be, they are not confident in their ability to overcome the social stigma (which reverberates to their lobster nerves.)

This, of course, is why the term was created. It is an in/outgrouping mechanism. You are either a dismissable conspiracy theorist, or you are a valid person.

One can be forgiven for viewing those who take the statist narrative side to preserve their own social status as a part of the problem.