It's not the study of anything. To study something, the rubber should meet the road eventually: you should check if the predictions you make are accurate. Praxeology does the opposite of this. It instead makes ridiculous bullshit excuses in order to rationalize why we shouldn't even check if its predictions are correct, such as...
A little time out here: what's particularly funny is that you rolled up to the war room all ''ha, I bet these motherfuckers never heard of the austrian or chicago school of economics!''
It really feels like 2011 again.
Mises had one policy making job in his lifetime, and that was as an economic advisor to Engelbert Dollfuss in the early 30's. He only had the one job because, well, it didn't go so well when praxeology met practice. Shacking up with any fascist they can find all for the sake of ''Liberalism'' is actually a fairly common trend among classical liberals/libertarians: you have Mises supporting the Freikorps, Mussolini, Dollfuss (writing that they literally saved European civilization lololol); Hayek writing in support of Salazar and Pinochet; and ''the Chicago boys'' drawing up policy for Pinochet (with disastrous results, mind you).