Elon Musk's companies employ roughly 170,000 people.
AOC drove Amazon out of New York, killing 40,000 jobs.
One creates. The other destroys.
They are not the same.
Mark Zuckerberg has access to billions of data points of the American public. A very plausible conclusion to draw from his letter to the House Judiciary Committee is that he is seeing the macro data and trends and is getting ahead of what he knows is coming in November. Therefore, this was not so much a genuine regret as it was a pragmatic business decision.