That's your opinion which has nothing to do with why Bitcoin was created. Read the whitepaper to learn more. Mining is essential to record new transactions and improve the network's security. It's a hard money that requires electricity and expensive hardware, setting it apart from other unsound types of money. 

You are free to leave any time you want. Have you seen the name of this forum? It's called Bitcointalk. It's obviously not a place you should be spending time on. 

Did you learn that studying for your PhD?