You argued for your rights, and I reminded you others have rights as well (because it seemed you had forgotten).
You're a scab if you work for free, replacing a worker that would have been paid otherwise. If you get paid for your MIT licensed code, you're not a scab :)
Because copyleft code benefits society as a whole, and the benefits remain around. Non-copyleft mostly benefits companies that are free to use instead of hiring someone to do it, or pay the authors of the GPL code for a proprietary license.
I hoped for a more intellectual discussion on why public domain is apparently immoral.