No, I don't think the paint analogy applies here. I have no idea how this thread became such a lecture session.

What BJSC has tried out has NOTHING TO DO WITH polishing and abrading the glass. The product he tried out removes impurities that get embedded in the pits that forms on the windshield. The material embedded in the pits causes much of the glare - over and beyond the glare that the pits cause themselves.

The material can be removed NOT by harsh abrasive polishing action, but rather by a cleaning clay that acts similar to paint cleaning clay.

No one is disputing that badly pitted windshields should be replaced - just that in certain cases, simply removing material from the pits in the windshield can make quite a difference in itself.