FB has done plenty wrong but you can make the point without upping the hyperbole as well.
There is a danger of FB manipulating things on its own but they didn't sell the data to any third party including Cambridge Analytica, it was harvested because of poor API policy(your friend auth giving access to some of your details) which was fixed in the future. The behavioral profiles were built by Cambridge Analytica on its own by the data it stole.
Why would FB in any instance even sell your data? I would argue it is in FB's interest to keep the data for itself, not letting anyone have it and be the gatekeeper.
The right thing to argue is, whether you want FB/Tiktok itself to have the treasure trove of data or not, and whether you want to allow them to use that to do precise targeting.
