Well, no. From Warren himself: "I made the bet... (2) to publicize my conviction that my pick – a virtually cost-free investment in an unmanaged S&P 500 index fund – would, over time, deliver better results than those achieved by most investment professionals, however well-regarded and incentivized those “helpers” may be." [1] https://www.berkshirehathaway.com/letters/2017ltr.pdf.

And, regarding being skeptical of things like "hedging risks" and "complex portfolios," I don't know. I'm just not sure enough hedge funds really do a great job handling tail risks to not be skeptical of all of them as a group. And, surely sophisticated investors can target specific sectors and build arbitrarily complex portfolios (if they're into that sort of thing) with passive things like ETFs for much lower fees on their own.