So, were I presented with your prior circumstances and had I capitalized on them, would my convictions have caused the company to fail, or steered it a less profitable path, or possible have been compromised through a slow erosion, greed, or a combination thereof?
For another take, if the Zuckerberg of 2004/2005 was presented with what Facebook would be in 2019, extreme success, billions of dollars, social problems, and increasing questions about what role it does and has played in Democracy and an informed populace, how do we think he might have thought of all that?
If Zuckerberg knew in advance how successful Facebook was going to be and how the product would look today, that could reduce focus and derail everything. The product evolved through multiple stages with different goals in mind. The path would definitely be different.
And for good reasons; on the one side he's the CEO of one of the biggest companies in the world, and any slip-up he makes will cost the company billions in lost stockmarket value. On the other side he has a family who are at constant risk of abduction and / or murder by people that want ransom or who he or his company have pissed off.