By they looks of it their docs are under a subdomain, and no part of the domain can be changed when setting the url this way. So it would still look a little out of place at least.
I mean, you're not wrong, but this is going to trick a non-zero number of people and that's not okay. We should expect more out of companies like Coinbase and hold them to a high standard.
This is unacceptable and the amount offered in general is low. It feels like we can agree on this.