Oh my... An argument for living outside of one's comfort zone the majority of the time. Tho there are exceptional people, and I suspect they live the magic of not having conventional comfort zones.
Imo the means to live outside one's comfort zone is paradoxical. The trick is to not have a fixed comfort zone. The comfort zone becomes a creation zone when it transforms in relation to life's opportunities. 'Uncomfortable' zones are not out to get you. They are unvisited territory waiting to be experienced, acknowledged, and if you choose, claimed for oneself.