Back of the envelope this though. Lets say a programmer makes $60/hr, or $120k/yr. Lets say Copilot replaces 5 minutes of googling around to find the right stack overflow answer and copy and paste and adapt it to fit. Copilot just has to do that twice in a whole month to be worth $10/month.
I don't disagree, but as I said, it's about comparative value to other tools. Any first world developer can afford $10/month.
That being said, if you are a full time employee you won't magically earn an extra $10 a month for using Copilot, you will only be more productive. It will benefit your employer and Copilot doesn't have an enterprise subscription yet.