I just don't understand why anyone should care what 'existentialists' think, or John Locke, or anybody else.
There is a goal, and there are strategies with various pros/cons for achieving that goal. Differences in opinion spring from having different goals, and/or disagreeing about the ways to get there.
What is talking endlessly about other people's opinions accomplishing? Is it about creating a 'robust philosophy'? Throws up in his mouth