Actually Deb, it's not the profile of ALL living persons that are now unlisted, it's ONLY the profiles for which there is no email address nominated.
Depending on other users' personal settings, this means that in theory we can also see some information about all other Wikitree genealogists.
I am not related to you but you can still view my full profile here
because I have chosen to make my profile private but with public tree and public biography.
It's only if you create a profile for someone who's living other than yourself. I created a profile for Natalie Imbruglia and for some of the other people whose family history has been featured on the TV series Who Do You Think You Are. I don't have an email address for her, and she probably doesn't know about the fact she has a profile, so her profile is now Unlisted.
Similarly I also created a profile for my mum and dad and a few more of my living relatives and they are also now Unlisted because I haven't given Wikitree their email addresses because neither of them are particularly interested in family history, hence the reason why it says on my profile son of [private father] and [private mother]. The only information I put on my living relatives' profiles was their name, their date of birth, their place of birth, and their relationship to other people (aunt, uncle, cousin etc). Private settings before the change only showed the decade to public users. I thought this was sufficient to "respect the privacy" as per the Wikitree pledge. Other members vehemently disagree.