I definitely agree for the rural / less accessible areas. Carriers definitely have a monopoly there and certain countries like Sweden, Norway and Finland are too vast to have good cabled coverage.
In most of the EU cities you got plenty of choice however.
That's absolutely true, the closer to the root nodes of EU you get the cheaper the bandwidth is. Heck, in Romania you can even get 10Gbit on a small datacenter for a few thousand €.
So sure, if the larger nodes can weigh up the smaller ones in a distributed network, then it might be plausible.
In most of the EU cities you got plenty of choice however.