If someone bought FAANG + MS + TSLA today and compared it to 10 years from now would they beat the S&P?

That's basically the point. It's easy to beat the S&P with knowledge in retrospect.

That's like betting on the Patriots for the 2019 Super Bowl.

It already happened and we know the outcome. Hindsight is 20/20.

Sure, in hindsight. I would argue that all of those stocks had their negatives in 2010 that could easily cause investors to look elsewhere though. The real question is what stocks are you going to buy today to beat the S&P over the next 10 years? It probably won't be that same bundle as in 2010.

yes, but he wouldn't find a lot of clients interested in paying him 2 & 20 for such a simple strategy

Also, just so little companies is very risky. E.g. if Tesla flopped you'd probably underperform