As I said, the computer is a workstation. The xrdp server is a server in the same sense as sshd. I access the workstation remotely from my laptop, iPad, Android phone, etc. I picked Remote Desktop over, say, X2Go because it had the best iPad client some years ago (Microsoft's own).

Ah, makes sense. I do something similar with Haiku and Apache Guacamole so I've got access to my dev box wherever.