me too there is a check i assume using some kind of input trigger in the hammer editor to keep us from doing that i assume if we could open the map in hammer we could disable it and attempt to use it to explore

Yeah I decompiled it and there is a bind trigger directly at the start of the map that does that.

See here.

Probably disabled to prevent the illusion being broken or skipping possibly invisible triggers for the changes.

passing triggers thus breaking the games code in some way