At 73 I also have other small businesses that I have done for years. Those involve trades that can last for decades, others for maybe a year a two. One is still done with my 42-year-old son, we started it when he was 11 years old. It has come and gone a few times, but we keep coming back to it, it keeps us in touch with one another.
The other business I started when I was 12-year-old child and needed money. I might have worked a lot of odd jobs when I was a teenager, but it was more satisfying to buy something and sell it for a profit.
Maybe you should try something on your own, using just you, and the intelligence you have garnered in your lifetime. Seeing your post in this forum only satisfies you, most of us read them and wonder how anyone can just accept it and not question it.