That's because it has no guaranteed outcomes and it's just a big bet. It's not a "solution" until it's proven to work. If you bet on some unproven tech to save you in the future and that never materialises then as a country you're fucked. So the disdain and contempt would be 100% earned towards towards anyone who would seriously suggest betting the future of society on some unproven technology. Only techbros would ever suggest something so profoundly out of touch with reality.