Well in a way I sorta agree with him, not a big fan of the market myself (I know alot of people have made a ton of money though).
I think his thinking is a little more like my own.
As in why invest, for example 100k in a mutual fund that may or may not make you cash, when you can invest that same 100k in yourself and have the potential to make massive massive returns.
For example I invested 100k in my own business when I was in my early twenties, and will barring a deal falling through, retire in 2 months or so at 30, had I invested that in a mutual fund, if I had averaged 8-9% or even possible lost money, I would not be getting ready to be a beach bum.
Of course you can loose money investing in yourself also, but I consider investing in myself a sure thing, that I can 90% control with common sense, while investing in a mutual fund is controlled gamble.
To each person his own though, there are many many paths towards the goal, and people have done well on them all, and as times change more paths will open and some may get narrower and close.