No dumber than allowing aliens to crossbreed no matter what side of the galaxy they are from.It is. And Fire didn't quote that part. It being artificially constructed and possibly spanning only some areas of space instead of being a naturally occurring phenomenon spanning entire multiverse would make it less dumb though. It being made out of literal fungi is still colossally dumb, no way around that.
Also, my whole thing is that how is having a universe-spanning network of any kind not helpful in resolving things like omnipotent beings or are able to utilize instantaneously transportation across the galaxy. So, why not have some sort of dimensional plain that would allow for such abilities? What about the aliens we have seen evolve to a higher plane? What's the scientific basis for that?
It strikes me that the objections are far more around the terminology than any thing else.