Why do people obsess over status, luxury and ego in real life?

Since my childhood i was into:
PlayStation games, coding, English, documentaries, being a good person, cats, useful things, healthy eating, working out, learning, art, improving yourself etc.

But when i go out, people look so cool, and they always try to show some luxury items or cars, they wear cool clothes, they try to look more egoistic or bigger or better than each other. I never got this pointless competition like we will never die.

Maybe that's why i never got lots of friends or girlfriend all my life. Never got this human nature and greed. Statue and prestige is very important in the society.
Why do people obsess over status, luxury and ego in real life?
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