Life is very simple, friend, don't make it too complicated.
Look at the people around you, they make money in their own way, more simply they will do work depending on the skills they have to make money (other than those you mentioned above). There are many paths to the level of financial freedom according to each individual, as long as you are still able to lift weights such as working at a construction site or developing skills in the field of technology, you can still bring money into your wallet.
Once in a while, come to a tourist spot like a beach, then pay attention to how the people there make money by selling services to visitors. If you are a creative type of person, it is not difficult for you to find ideas for making money by selling services to other people.
Markets revolve around money, anything could be or have a market. I've looked around society, as you said, and was surprised to see the creative ideas people use to make money. Life has never been similar for every occupant of this earth, people must earn money in different ways. Like my friends would say in a discussion every industry has a millionaire in dollars. No matter the type of business man lays his hands upon, he'd be able to hit millions of dollars. Provided that people want the service or product. To generate wealth we must take raw materials and convert them into something people want or need. It all depends on what Op thinks about his society, a lot of services and products are lacking in every environment, so whenever a person begins to offer such services he makes lots of money. Only a few opportunities are rushed by people in society, they can't see the hidden treasures in their society, and that's why most entrepreneurs are not able to earn much money in recent times.
For instance, some countries lack agricultural produce, so it's simple to set up a website and communicate with citizens in food-producing countries to ship food down to your country. People will easily buy the products because they need them for cooking. The internet has made life easier for everybody, and it only takes a little research for a creative person to earn big using the internet. Whatever skill one possesses he can advertise on the internet, though it takes time, and earn tonnes of recurring customers, thereby yielding him some funds. In a condition where the person isn't trained on how to use the internet to make sales, he can still follow your advice on using his ability as a man to help in setting up structures. Those are nice industries that generate lots of money for men. Building of houses must go on every day. Contractors and workers share lots of money every day.