He built a keyboard without the keys or switches. That would be the most useless keyboard ever made until... he obtained pre-made keys and switches from a keyboard vendor. The gripe stands despite this being cool. A more honest description would be he made part of a keyboard or maybe the frame of one.
All the switches do is close a connection between two wires. He could have used bent paperclips and taped cardboard on top of each one for the keys. Would you be happy then?