Why it's easier to be the bad guy instead of the good guy

When we are the good guy, sometimes people won't notice, and we get nothing in return.
When we are the bad guy, if people don't notice, we will get more in return.

Good guy need to be afraid of bad guy but bad guy does not need to be afraid of good guys. Example? Good guy goes into the bank to deposit 10k of cash, bad guy came in with a gun to rob the bank. Can the good guy not to be afraid?

What makes a bad guy? Opinions, laws, common sense, etc. If there is no good guy and bad guy in the world, the world would surely be a better place....