Hardly advice which everybody should take."Never buy an individual security", for example. If everybody followed this advice then the only people trading stocks would be mutual fund managers. Maybe that would be OK, but it would leave the market in the hands of a relatively small number of people, and that could make manipulation easier.Also, "Avoid actively managed funds" to avoid the fees sounds good, but the bottom line is performance. If a fund outperforms other funds after the fees, then it is a buy. The performance of the fund is what matters, not the fees. That said, I would definitely avoid a fund with a front-end load.