Take my statement as shorthand for "I don't believe that it's possible to purchase a public good and the economic theory that public goods should be privatized is legitimate only insofar as it would lead to desirable revolution". I'm happy to disagree, though -- it's not exactly a settled question and I doubt either of us are going to convince the other during this conversation.

Dominant among whom? People who want to gut public institutions and "The Commons" and carve up the spoils like post-Soviet kleptocrats for their own personal gain?

There is a large population of people (including many economists) who DON'T subscribe to your supposedly "dominant" theory.