When reading the title my response was "Nothing, but there are all sorts of potential problems in the stuff that you are implicitly adding to it". The use of the term here is as a symbol representing a bunch of cultural mores and attitudes that are distinct from what is contained in a definition of the world. If you must use 'rationality' to describe the problems you mention here then at least give it a capital 'R'. Much like of the two most significant political parties in Australia the conservative of the two is the 'Liberal' party and 'Freedom Fighters' do all sorts of things not necessarily optimised for furthering freedom.