Right, I don't know why people are so invested in minimizing how powerful this tool is. I have never properly learned Javascript but I can write Javascript using Copilot because copilot doesn't really make syntax errors, and I can recognize correct semantics, e.g. is it probably doing what I mean for it to do. And then I can, as you say, just test it.

It also bears repeating that Copilot will only get better.