Most of us endorse the separation of Church and State. What we separate, though, on business time, is Means and Ends. Ends are posited by clients. Means are supplied by professionals. Ends are consumer preference.
Means are professional services.
Ends are free, subjective, and arbitrary. When they are insane, they are Visionary. Means are carefully crafted, objective, and expensive. As a peasant would have left his superstitions behind in moving to 18th century Paris, as a shopkeeper became a citizen in leaving behind his narrow views and entering the public square, as the artisan entered the salon to emerge a philosopher, so we leave our village beliefs behind at Yale, or whatever school teaches us our professional stock in trade. Business manners, a certain smoothness and lack of friction, make us mixable with clients from all walks of life, all religions, all kinds of ethics, manners or tastes, from all over the globe.