Yeah but that is business. That is exactly how a good business man approaches business. Study the market, determine what is successful, emulate them but either more efficiently, to a new niche, or marketed better.

I mean the whole point of business is to maximize the return on your investment.

Now making absolute garbage may not be the right solution, and making incredible product that takes 5 years to develop is probably not the right solution either... finding the right mix is key