Regardless of what I may think or believe, the fact is that PostgreSQL is a superb relational database system. Of the open source database systems, it is by far the most capable and robust. Its price and very liberal licensing only make it better. This is indisputable.

I don't see how taking an unemotional look at the facts, especially when purely objective technical analysis is involved, is in any way "poisoning the discourse".

As professionals, we should be able to look at our tools and openly state which are good, and which are bad. Detaching oneself from emotions and personal convictions is one of the hallmarks of professionalism, regardless of the field in question.