And wearing grey t-shirts won't make you Zuckerberg [0]. You don't become a 0.00000001%er by mimicking the most meaningless aspect of their life.
Seems to me that this is particularly affecting people who aren't satisfied with themselves / rarely reflect on themselves and get caught in the rat race without ever pausing to look around. You can always be more successful, earn more money buy more gadgets, have a nicer car, more awards, it's an endless quest, but if you're empty inside these things won't help you.
[0] https://careers.workopolis.com/advice/the-reason-mark-zucker...