I did not switch any position at all, you are simply attempting to read something into my belief that is not there. I spoke only of Convenience in my first post, you wrote of something entirely different than can be defined by "convenience" I simply pointed that out. Then I pointed out that there is a difference between Convenience and Need.
The difference between "Need" and "Convenience" is easy to define. We'll begin with my own words: If you do something to preserve your life, such as eat, that is a need, if you do something because you do not want to be bothered with the responsibility, or simply to decorate, that is Convenience.
Much like killing Buffalo for only the tongue, that was Convenience, killing a Buffalo that is attacking you or others, that is need.
It doesn't even take much of an imagination to define it, amazingly there have been billions following such ethics for centuries.