Most founders I meet are solving the wrong problem.They spend months perfecting the product. Zero time figuring out who is actually going to buy it.I have built five companies.The ones that struggled - we fell in love with what we built. The ones that worked - we fell in love with the customer's problem.That gap is everything.When you love your product you defend it. When you love the problem you listen.Listening is what turns a product into something people actually pay for.I have watched founders raise funding, hire teams, build for 18 months and launch to silence.Not because the product was bad. Because nobody validated whether the pain was real before the first line of code was written.The most expensive mistake in business is not a failed product. It is a product nobody wanted that took two years to build.One question I ask every founder before I write a cheque:Have you charged someone for this yet?Not a waitlist. Not a letter of intent. Not a pilot.Money. In your account. Before the product is finished.If the answer is no - we are not talking about building yet. We are talking about validating.