I somewhat dislike the SISP saying because it describes an attitude, not an actual product. Many successful companies have started from a "solution" (more accurately a technology) like Google and Akamai, and it is perfectly legitimate behavior to try to find problems with a solution. The situation described by SISP is when a founder does not respond to a real, serious customer problem and instead has a problem conjured on his head which he "solves". A better saying would be "Person Not In Search of a Problem".
On a broader level, pure solutionism tends to only really work when you have some novel research, then need to find a use for it. And these inevitably comes from academia because you need someone to subsidize the risk. Then you plug it into some real problem. Many people who start with the goal of being a founder naturally try to start with problems. OpenAI was very of the first, VR was the second (it tried to respond to the soft data, mostly an idea, that people really wanted VR but ultimately this was false).
On a broader level, pure solutionism tends to only really work when you have some novel research, then need to find a use for it. And these inevitably comes from academia because you need someone to subsidize the risk. Then you plug it into some real problem. Many people who start with the goal of being a founder naturally try to start with problems. OpenAI was very of the first, VR was the second (it tried to respond to the soft data, mostly an idea, that people really wanted VR but ultimately this was false).