Isn't it all a gamble?

Hello all, I have a doubt regarding fundamental of stock market.

  1. When a company releases IPO and sells it's shares. Buyers pay them the capital required and so their job is done, leaving no role to play in secondary market. So now value of your share is only dependant if you find a buyer. If no buyer , then it's actually 0 value.

  2. Since company has no role , all the buying and selling happening in market are based on 'news' and 'quarterly results'. All that is happening is manipulation into buying and selling shares.

So isn't all just a gamble? Performance of company has no relation to buying and selling of shares. Profit/loss of a company has no direct impact on your share price. It's just how people take the news which makes the loss and gain of the share.