I wonder where we'd find the line that the "but actually it's all perfectly legal!" crowd would decide to drop the pedanticism.
If a FA was trying to have a passenger removed because they were LGBTQ or were wearing a headscarf or yarmulke? Because an airline employee wanted the seat for personal travel? Would it still be important to remind everyone that an airline employee can have you forcibly removed for any reason they wish? Or would it at long last become kinda beside the point?