I'm not arguing in bad faith :(... in fact you are arguing in bad faith more than. You're assuming something I don't mean to imply!
I prefaced my question because "my religion told me to" is boring, and I assume that I wouldn't be able to learn anything from that reasoning. If however, the reason isn't based in religion, I've never considered it, and would be very interested to learn something I've never heard before
I don't agree it's a perfectly valid reason. I believe religion as a whole, is a net negative for humanity.
But I do agree that anyone is allowed to take their morality from anywhere they'd like. I don't intend, and would reject the idea of anyone who tries to control what other people want to believe (some restrictions apply). So anyone is free to believe that ethics and morality can only come from religion, I personally think that's dumb, but they likely think my reason are dumb, so we're even.
I'm just not interested in the religious reasoning... but almost exclusively because I find it boring, and not useful to me.