The U.S. stock market should do well for long-term investors, even if Buffett isn't enthusiastic about its current leadership.For decades, investors have closely followed Warren Buffett's market commentary, shareholder letters, and discussions at Berkshire Hathaway's (BRK.A 0.09%) (BRK.B -0.01%) annual shareholder meetings. These kernels of wisdom help filter out market noise and serve as a reminder to focus on fundamentals.Despite an identity built around buying businesses and picking winning stocks, Buffe ...