High blood cholesterol levels are bad for the heart. Like meat, eggs, and poultry, shellfish contains cholesterol. ...

Emil-Kunkin on July 20 at 02:05PM

The author isn't trying to show that the other forms of protein are bad, the author is trying to show that shellfish are not necessarily bad. One way to do this would be to show that shellfish is healthy, but showing that the other forms of protein isn't actually relevant. This might show that shellfish is less unhealthy than meat, but that isn't the argument the author is making.