The problem is this isn't what gets you the smartest people on the planet. A small number might be interested in DS&A to that level, but most are not. They will learn enough to know how to google what they need and move on to what they are interested in. Smart people are constantly getting job offers from coworkers and bosses who move to other companies if they don't start their own.
The few smart people who do put in the effort necessary to go to the FAANG companies always leave after getting the golden sticker on their resume. They leave behind them a residue of SAT preppers who have PhD's in inversing binary trees.