Generally, occupations, where the final arbiter of truth is
aesthetics, are dominated by liberals.
Generally, occupations, where the final arbiter of truth is replicable
measurements, are dominated by conservatives.

I would assume that most dance choreographers are liberal.
I would assume that most machinists are conservative.

But here on rec.crafts.metalworking, I am reading some posts by
liberals who are interested in metalworking.
What gives here?
Are liberals just looking for forums to argue?