That's not true of the Facebook people I know. They include some of the best engineers I've ever met. (No other connection to Facebook, just a personal judgment

That's not true of the Facebook people I know. They include some of the best engineers I've ever met. (No other connection to Facebook, just a personal judgment based on their externally visible work.) More generally I find that different people work effectively at different timescales. Some of the big movers in the industry have achieved phenomenal things by focusing on one problem for decades. Definitely true for databases, which is what I work on.