It’s obvious that this question was written by a child or someone learning the English language, given your spelling mistakes, grammar use and references, however:
ELI5:
The answer is yes, we can have “good AI” like JARVIS, but AI is still early and doesn’t make money for companies.
Companies make money selling a product, and AI isn’t a product because it isn’t something that belongs to them. So they sell people’s information that they get when people talk to the AI.
But that doesn’t make enough money to pay the bills for AI, so they charge subscriptions. People who pay the subscriptions want to use the AI “for evil”, as you put it.
So in the end it’s about “making money” with the AI, and JARVIS does not make them money.
If you learn a lot about computers, you’ll have your own JARVIS. I have one. It takes dedication, like anything else in life. Good luck with your school project.