I also find it baffling that inclusivity folks find a term that used to be male exclusive becoming applicable to both male and female as problematic. Wouldn't they want something like this to happen?
I don't see this as too baffling- in their logic, if you have two alternatives (landlord and landlady, say) and landlord gets picked, it's evidence of patriarchy (because it defaulted to male). They would prefer "landperson", or perhaps "rent seeking capitalist"