After a long-running blogpost holywar between Telegram and Signal, I perceive these “security experts” as Signal/Telegram shills depending on their stance

Russians having their flashbacks of the main war propaganda network in their homeland

so they can filter them from “often visited”

But according to the issue on Bugzilla you have attached, this is to prevent suggested sites from showing alongside these adult sites, without filtering the latter out. Do I understand it wrong?