step 2. Psychologist being aware of defense mechanisms, declares with no apparent evidence/testing that they are immune to them.
step 3. Psychologist ends up with beliefs no different than anybody else.
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Edit:
I'm unclear what to even make of the article. To read it as a criticism of Freud that he fell onto religion when his own death was near? To read it as a celebration of religion that a controversial and disowned psychologist turned to it in his old age? Or just an assortment of historical facts without any larger relevance?
Also, maybe I'm a little turned off by the typo in it. Makes it feel unreviewed.