I have no considered opinion on the GitHub thing in general, but Copilot depresses me. Any tool that makes you more productive at the cost of taking away the pleasure of figuring it out on your own bores and depresses me.
I mean, you don't have to use these tools yourself, particularly since you have to pay for it and therefore there is no "it is free" allure.
While I understand what you are saying about the pleasure of figuring things out yourself (and do enjoy that feeling myself), I don't feel that the mere existence of the tool affects me that much.