Do You Start With Topics?

I like to find the pain point before i start, or at the same time as i'm starting. So i can go into the business with a hypothesis on what will i probably be selling,. And i always start with that pain point. But i've found in businesses that i've started that it changes over time, or i need to pivot. For ext example, the dog web sid that i had, webbs hid, initially started because a lot of people were trying to find a adoptor by this dog, and they kept getting scammed. I was doing a good deed, and i taught people how to stop scammers, but i learned that the real pain point was the people