Or, if you're not, you should be.
But, if copilot instead suggests just writing out the contents of the library directly into your code base a lot of people will do just that. That'll be lots of fun when you're trying to track down obscure bugs in huge piles of murky "copilot assisted" code.
It'll be especially bad in environments where developers feel either extrinsic or intrinsic pressure to always write more SLOC and churn out more PRs because it will allow developers to create a very compelling illusion of productivity.
I have a feeling this will be one of the long term side effects of copilot. I'm actually suspicious that this dynamic will blow away all of the productivity gains and then some and might lead to companies banning its use when they realize the true costs of sifting through the GPT spew.