Isn't that what happened to the DSL market? No one will bother laying new infrastructure because anyone can use it.
But then you'll be called a communist.
Also the OSS/BSS/ops implementations for shared DSL were too costly and ineffective; we can do much better with today's software.
I always had the idea of timed exclusivity - whoever builts infrastructure first should enjoy 2-4 years of exclusive operation before other providers can join.