A cab ride later.. why do I exist.

I took a cab today. the driver is in his late 30s, you'd hardly guess he is 30. looked very much like late 20s or max early 30s. Genetics might be on his side. He has 2 house in Mumbai. And a Xerox shop plus much more. He earns one lakh per month aaram se. He said a lot more. showed me pictures of his family and everything. made me wonder why I'm even doing a PhD. like 10 years of acads later, I'll be earning 20 lpa starting. :)