I think this is a point in favor of the parent, actually. As you said, you described solutions, and the "problems" found by inverting them are not really things that people would say. To some degree, the founders thought "this product would be awesome if it existed" not "I'm solving a painkiller-level problem here"
For example:
- Facebook: "it is hard to connect to young people at my school" (what do you mean? I'll just go to the campus bar)
- Apple: "I want to get into home computers but I don't know how to solder" (ok, let's start a soldering school?)
- Amazon: "I don't want to leave the house to buy books" (???)