The problem (or A problem) with copilot is that it tries to sidestep those licenses, purpotedly allowing you to build upon the work of others without giving anything back even if the work you are building on has been published on the explicit condition that what you create with it should also be shared in the same way. While the great AI tumbler makes the legal copyright infringement argument complicated by giving you lots of small bits from lots of different sources it really does not change the moral situation: you are explicitly going against the wishes of the people that are enabling you to do what you are doing.
Beyond copyleft, this kind of disregard for other peoples wishes also applies to attribution even with more liberal licenses. Programming is already a field where proper attrubution is woefully lacking - we don't need to make it worse by introducing processes where it becomes much harder if not impossible to tell who contributed to the creation.
Now I am all for maximum code sharing. I'm all for abolishing copyright entirely and letting everyone build what they want without being shackled by so-called intellectual property. But that is not something Microsoft is doing with Copilot. What they have created is a one way funnel from OSS to proprietary software. If Microsoft had initially trained Copilot on their own proprietary sources this would have been seen very differently. But they did not. Because the way Microsoft "loves open source" is not in the way of a mutally beneficial symbiotic relationship but that of an abuser that loves taking advantage of whatever they can with giving as little back as they can get away with.
