If it's possible for us to coexist with our own super-intelligent AI, it might make sense for them to act as intermediaries when communicating with other intelligent beings out there. It might mitigate some of the risk to ourselves by keeping our true nature a secret as well as signalling our capability to deter them from getting funny ideas. That is, unless our AI is given its own agency which we allow to supersede us or if we "merge" with it, whatever that means.