Privileged bubble?
Perhaps not quite the correct adjective ? 'Supportive Bubble' might be more accurate - the Cameraderie and tightly organised 'structure' of both the Royal family and the Military provided that for Sussex ALL his life, and now there will be no structure or discipline [beyond the next Therapy appointment or Yoga Session].
He will be 'all at Sea' in no time.. no matter how 'loving' his Wife...