As bcoburn said, the point of this post appears to be to highlight the large inferential distance between mainstream thinking and many settled issues on LW. It doesn't appear to be trying to refute the LW attitudes. Furthermore:

[the list of points are] deliberately phrased to incite kneejerk disagreement and ugh-fields

It is trying to list them as they might be seen by outsiders in the least convenient possible world (and/or real world).