This is neat but totally leads to false "validation". This is slightly better than just getting an email. Product Market fit (or even Problem Market fit) is more than someone just imagining their future best self as being interested. True validation has the prospect part with something of value, real value, not just an email. Like, give me $100 and I'll tell you how I've boot strapped a company now worth $4MM. Or I'l…
Sure, I can see that. But the application of this is such that you can expand it to include whatever sort of validation you need. When you get a list of people who imagine their future best self as being interested, you now have a list of people to whom you can more rigorously validate with. You can send them all an email asking for an interview, pre-order, etc. But regardless, this helps you build that initial list.