Why does kickstarter allow so many awful projects on their site? This is very far from the worst of them. I enjoy reading https://www.reddit.com/r/shittykickstarters/ but they have nothing to gain from being associated with this kind of stuff.
The other kind is the one where the product is very pie-in-the-sky, requires multiple breakthroughs in the process of making said product, and the creator shows a clear lack of expertise or reputation in the disciplines for making the product.
Often, the people that take the bait in the second group are an extreme case of wishful thinking of wanting their past vision of the future (which is today) to be full of wonderful tech products, and they see something remotely futuristic and throw their money at it.