First, my ONLY interest in this subject is regards FL and its close association with Google (multi-second browser pinging, etc).
Second, the concern doesn't mean distrust. FL is a business that needs to communicate its great products and services.
Where the 'rub' comes is exactly how FL browsing/use interfaces with the new tracking proposals (cohorts, groupings, etc).
Below are two example articles (don't appear to have an agenda). Interestingly, the 1st points out that there will be no religious cohort/advertising groups.
https://www.searchdiscovery.com/blog/floc-and-fledge-clarity-for-marketing/
https://infotrust.com/articles/operation-turtledove-fledge-remarketing/