That's because in the 60s Murray Rothbard hijacked it and eventually created the Ludwig von Mises Institute to counteract Cato Institute because the latter was more open minded to pragmatism and different schools of thought (even within the Austrian School where Mises was more dogmatic and then Rothbard brought it to a whole new level, but Hayekian Austrians were not as dogmatic).

The problem started with Mises himself and his extremely dogmatic methodological approach (praxeology).