Who is "we"? Thinking big picture here, from a corporate POV, it's entirely possible that the discussions of ethics around handling and retention of data is way outside of the engineering core.
Furthermore, while it's interesting to read about this good intent, that doesn't change the reality of the situation. Your post actually bothers me more than pure maliciousness or opaqueness, because I know it's entirely possible these systems and workflows could be out of control... which is reflected extremely well today in the major complaints and scrutiny of the platform.
The tinfoil hat side of me does not believe this is a genuine account, but eh, there's no way to know here, and at least it opened up an interesting discussion