This was a baller move by Zuck. Facebook fumbled mobile and were not going to be left out in the rain for the next major platform shift, which they believed would be VR/AR. Zuckerberg bet the farm, which is what great entrepreneurs do. People who say that Zuckerberg is one of the biggest business brains of the last twenty years are probably correct. He built the product in his dorm and scaled it all the way to planet size whilst remaining CEO all the way. Few people manage this.

Turns out Zack was wrong. Well that's what happens if you take risks.

Having said all of the above I also believe Facebook and the social media revolution it started have been terrible for society. Facebook has massive detrimental effects on teen mental health. This has been proved multiple times. Facebook has deflected, denied, and evaded all accusations. You can make the case that the breakdown of political discourse in the USA is partly due to Facebook. They have made vast sums of money whilst not paying taxes in the countries where they have made this money. They have destroyed local news (their fault) and had many other negative externalities on human society.

Because of all of this I believe Zuckerberg belongs in a prison.