see, i had the same thought. why would they mention that there's only certain chambers that mr fuji can enter, if you can't get in there somehow?? unless it's just one of those random sentences, which is kinda rare/stupid.
I've never known them to do any 'stupid sentences' so I'm thinking could it be a watch this space thing?
Cause the radio tower is off limits also, in fact Lavender Town is pretty darn useless...