I believe stock market makes you mature & mentally tougher than most of the other professions out there.
You see a lots of ups & downs in a year than an average person will ever see in 10 years.
Also, your ability to be surprised goes away (both in good & bad ways) because you get accustomed to volatility.
You learn a lot on behavioural psychology, personal finance, risk taking, economics & understanding businesses from stock market than any university can ever teach.
It develops your mind to think broadly & connect the dots.
Hence I always say, Stock Markets are best place for people who are hungry for knowledge & money. It gives you both.