That's a simplistic question and perspective to a loaded, multifaceted situational reality. Just because one is happy doesn't mean all, others or you will be happy. I am tickled pink with the freedom and liberty. But it takes finances to be able to do so. And happy with new places to travel.
The long term happiness due to these factors may not, probably not, be sustainable.
But what an adventure!
For most, if not all, probably a stage in their life. Not ideal for the extroverts, insecure and uncertain. There are downsides of loneliness, uncertainty, acceptance and social outcast. This lifestyle is ideally suited for the introverted, minimalist and independents, ideally. Lol.