Why call it Crowded House then ? Just bill it as Neil Finn..
Because of Nick.
Remember "Time On Earth" started as a Neil solo album with Nick playing bass, then it was released as Crowded House. Whereas Neil's other solo albums did not include Nick.
So the question is not "Why call the band Crowded House ?" rather "How can we NOT call the band Crowded House ?" when the only surviving original members are playing together.