Low Margins are bad. High Margins are good - Revisit

True or not?

Can investing be made so simple by thinking that all low margins are bad and all high margins are good? Then every Tom, Dick, and Harry can become good investors by looking at margins. In the real business world, it is not that simple. You have to go beyond it to fully understand how such companies have managed to survive with this business model over market and economics cycles.

It is somewhat similar to the ideas of "Low Sales Commissions are bad. High Sales Commissions are good." Marry The Guy Who Has 60% Sales Commission. Some low commissions salesmen may be paying high income taxes. Get it?