I do understand what you're saying.. and I agree that it's possible, I just cannot agree with your choice of words. Language is incredibly important to me to convey what one means exactly and feasible doesn't apply here as far as I can measure.
Practically and functionally, cloud servers seem to be a large undertaking both financially and labor resource wise. Something SE has looked into and decided against. As I cannot say I am privy to any of their reasons I have to accept that a company of their resources, talent, and experience combined with the passion that the FFXIV team has shown to try and deliver a certain level of experience, has not dismissed them as an option lightly.