I wouldn't call it stupid unless you're participating in the VC ecosystem. If your aim is to build a sustainable business and get rich slowly by all means go for it. But if you want to get enormously rich the American way is clearly superior. Go big, fast, or go home. If the VC loses all their money who cares? Play at capitalism and lose, you lose your stakes. If you as a founder fail, well either try again or play a different game, one that doesn't involve questions like "Is the total addressable market here over a billion dollars a year?"