No, it’s not gambling. It’s people coming together in order to build something. And a place where people can sell their stocks is a stock market.

There are many problems in this world. But there existence of stocks and the fact that they can be traded is not one of them.

That doesn’t make any sense. That way you could only buy stocks and never sell them. Then what’s the point of investing? Also you couldn’t just leave the company behind if you stopped believing in it and its leadership.