I always thought it was an exaggerated portrayal, but it seems your ways are even more extreme than in the movie.
Such lifestyle is so completely foreign to me, that I'm fascinated. If an alien landed on my lawn tomorrow and said "I fart gold coins", I would have an easier time believing such a thing exists than your lifestyle.
How do you make friends? Can't employers sense that you're going to leave soon? Or is that specifically what they're looking for?
I job-hop more than most people, but it's not completely out of the ordinary in tech work. Many people stay in one area but still change jobs every few years. People used to occasionally question some shorter (1-2 year) job stints on my resume, but I haven't been asked about it in over a decade. I don't think that particular aspect raises eyebrows anymore. There are more tech jobs than people to fill them; it's a job-searcher's market and has been for a long time.
I've never had a mortgage; I generally have zero debt (not even car payments); no dependents; usually no pets (I miss having pets, though). I don't own much of anything that I'm not willing to get rid of. I like the idea of having a home base and some permanent material items, but so far I don't like it as much as I like being flexible.
Working in tech offers the option of remotely working from anywhere. I've worked from home (or wherever) at a number of places, going back to the early 90s. I've still spent more time in normal office jobs than remote. Now that covid has permanently altered the landscape, I expect to do it a lot more.
There are unhealthy psychological aspects to all this. I avoid commitment, I feel trapped by obligations and responsibilities, I'm always thinking about what's next instead of being content with what I have. It's not for everyone.