Yes, yes, you have very good points there.
But, its easer to get you protien fix from meat than other sources.
Fish is probably the only meat we should be eating large amounts of.
None of this is going to stop me from eating cows.
Fish, eh. I eat shrimp because they literally are the cockroaches of the sea, and since I kill bugs when they enter my house at night and can't get rid of them, I don't see why eating shrimp is wrong. Fish is healthier to eat than red meat, but the problem is a lot of our waters are polluted, ergo the fish are polluted too.