There's still no good reason I cannot opt my code out of it.
Letting people see the code doesn't mean they can ignore the license and do whatever the hell they want with it.
I am quite reasonable. I favor the MIT license. I still do not want my code in Copilot, which pretty much dismisses my rights entirely.
It is basic human decency, and copilot would still be possible even if some of us opted our projects out.