Facebook did many things right. How many people really thought Facebook would be a $450B company in 2017, good for top 5 most valuable company, and pulling in over a billion in profit a month. Yes most of the money is being made on mobile which likely wasn't the master plan of Zuckerberg or others. But things had to go right up to 2013/2014 to allow Facebook to become huge in revenue and profits with its mobile business.
We don't know exactly how much influence Zuckerberg had in all the decisions. For example the common theme for years was for there to be uproar after any major feature or change.
Like the news feed that is now ubiquitous. A worse company might have feared the backlash and slowed down on features and growing the news feed.
I assume Zuckerberg was also fundamental in acquiring Instagram and Whatsapp. Instagram is worth tens of billions now. Whatsapp has 1.2B or so monthly users. There were many comments on how overpriced and silly the Whatsapp purchase was. But most of it was in stocks and the cash at the time may have been a lot ($4B), but Facebook gets that much per month now. Whatsapp tripled its users since its acquisition.
A lot of tech people disliked the Messenger split off. But that seems to be working out for the business too. It is becoming its own platform now and can also boast 1B+ users per month.
Maybe anyone would've done all this. I don't know. But I do know it was Zuckerberg in charge when all this occurred.