Is anyone using Dall-E, Imagen, or any other generative model for art to create commercial products? If so, they're probably also concerned about copyright issues.
CoPilot is being offered for widespread commercial use, so it's held to a higher standard. Respecting copyright is much more important when you're building a business and not just sharing fun AI art on social media.
OpenAI currently offers a GPT-3 API and an invite only DALLE2 API. Both of these are commercial products trained on web datasets and can output collisions with the training set. They have effectively zero concerns about copyright due to it being covered under fair use and OpenAI having copyright on all outputs (in the case of DALLE2).
CoPilot is being offered for widespread commercial use, so it's held to a higher standard. Respecting copyright is much more important when you're building a business and not just sharing fun AI art on social media.