Survivorship bias. What about all the other companies that were the size of Berkshire Hathaway in the 60s, Microsoft in the 80s, Apple in the 90s, etc. that didn't develop into massive successes?
It's also worth noting that Berkshire Hathaway the textile company no longer exists. The mill was shut down long ago and it's essentially the same company in name only. In fact it's hardly what you would consider a business in the typical sense of the word. BH has something like 30 employees (at Berkshire Hathaway itself, the rest are all employed by companies Berkshire owns, which it handles in a very hands off way).
So citing these companies as evidence that criticism of Facebook is unfounded is of dubious validity.