Expand on the unethical part. So people published code that could be referenced and copied on GitHub. There was no ethical problem, the world, society were happy.

Github make a convenient way to search and contextualise this publicly available code and paste it into your code (adjusting local scope, format, language along the way). Suddenly we have crossed an ethical line!?

Which ethical line? Are you pretending people never copy and pasted open source code before copilot? Are you pretending open source code never copy and pasted other open source code? That we were in an ethically pure world until copilot came along?