In the beginning, there would've been unintentional cognitive dissonance while caught up in the moment or willful ignorance about the scope and nuances of harm.
Now, there isn't much excuse. MZ has really tried to address aspects of potential harm. For example, Meta isn't like Twitter: random employees cannot access any user's data without a business reason and sign-off from a manager or an appropriate privacy person. However, the Myanmar genocide happened. The root issue is there isn't enough reliable human or algorithmic effort to ensure continuous, global, perfect safety... but they are trying. They will fail sometimes. The question becomes: what are legal, ethical, and moral duties, boundaries, and liabilities any nation should require and accept in this area?
Let's not jump to conclusions. Zuckerberg knew and knows very well what he was and is still doing.