My original point was about particular individuals, womanizers that I've had conversations with and one of whom I knew very well.

I'll agree that womanizing might arise out of thinking every woman is unique in a non-trivial (albeit not necessarily benign) sense, as you have suggested, but my point was that there is a tension between maintaining uniqueness and considering them fungible (even if they're not totally incompatible). I'm not in the slightest interested in PUA and dating/seduction techniques and related topics, so I don't have anything more to say on this topic.