Let me explain. You should start a business so you can learn more and through that, you can provide value to others. When you're passionate about learning you can always find a way to bring value to others.
Here is an example: I started my clothing brand because I wanted to learn how to connect with wealthy people, improve my financial literacy, learn about how clothes are made, how businesses overseas are operated, how social media works, and how to communicate a story to people. Through this whole process, I have learned that owning a business changes your vocabulary because you start talking like a business owner whether you're a small brand or an already established brand, and that itself gives you credibility leading to doors opening. I also wanted to learn about the different steps of manufacturing clothes. Whenever I'm at a clothing store, I don't look at the price, I look at the manufacturing process of that shirt to determine if I would buy it or not. I've learned that business overseas is completely different from business in the States. China is a manufacturing country and the United States is the consumer of those manufactured goods meaning China makes goods for us, we buy those goods from China, then we re-sell it here and it has a lot to do with cost efficiency and cost of materials. My communication skills have improved, I've been able to close sales for my clothing brand because I was forced to talk with more people.
All this has allowed me to bring value to my customers because they aren't buying a denim jacket, they are buying a lifestyle because I was willing to learn and tell a story through my brand.
Moral of the story: Start a business that will force you to learn selfishly and in return provide value to others as you learn.