You are confusing having a nation whose culture is Gaelic with returning to a medieval Gaelic society. Gaelic culture has changed, evolved and absorbed since the middle ages, indeed in the last hundred years and continues to change, evolve and absorb. Here's one example
nós*|iris ghaeilge
The common culture of the majority of people on this island is not Gaelic. It may have been the culture of their ancestors but it is not theirs now.
Ironically, I think we still operate a medieval Gaelic political system. Power is everything. Power is gained by creating a support base that is dependant on doling out the resources that are controlled as a result of gaining power. The system is self sustaining in that power cannot be gained without patronage and vice versa.
While I do not see why "rambling houses" should be exclusively rural, they were just a means of cultural expression, which of course were also a means of expression for rural anglophone culture.