Everyone, including Warren Buffett, says to just buy the S&P 500. Investing isn’t that simple, however: it’s nuanced.It’s common these days to hear:“Hey man, just buy the S&P 500 and in 30–40 years you’re set for retirement”.While the S&P is a good investment in my estimation and perhaps the best investment for those who are just starting out with investing, it’s not the only investment one should…