1 - Millionaires are greedy, that is why they become millionaires.
No one becomes rich until they solve a real world business problem. If greed can help you solve some real world problems and reduce the inefficiencies, then greed is good and becoming a millionaire is just a by-product of your efforts.
2 - Company managers just want to use the workers to make themselves rich and others poor.
People management is a great skill. Slowly and gradually when you business expands and you want to shift your focus to a bigger picture, you will have to rely on your workers/ employees for them to ensure that you are successful... In return, you will have to think of ways and means as to how they can be successful too.
3 - Having money is a question of luck, if not of "gods grace".
Having money is an outcome of hours of study / execution / hardwork / passion / sacrifice.
4 - Debt is always bad.
Mostly bad. But sometimes, debt can help you get the required quick start in your career.
5 - To make money, you just need to have a great idea nobody thought off.
Not really. You just need to be early in the game. No 2. is good enough