And it's more than half rhetorical, inspired by a mention on a mailing list of selling your house yourself, and advice on preparing to do so.  Right there on the list of to-do's, sure enough, was"de-personalization".
I've always wondered about that.
Why is it that, when endeavoring to convince some person that your house is a place they want to live in, the first thing a realtor will advise you to do is to remove all personal touches and turn the house into a bland, sterile, cookie-cutter place that you wouldn't want to live in?