YMMV and it's certainly not for everyone. But I'm skeptical that staying in your comfort zone your whole life will do anyone much favors. (and the odd few week trip here or there doesn't really count, by all means all travel is great but vacation and just passing places through is fundamentally different from spending at least a few months or even years somewhere)
You are missing the point. The article focuses on mindless tourism as a source of excitement rather than any deeper meaning.
Taking pictures for instagram has little to do with exiting your comfort zone.