Young consumers are also more open to new consumer tech than older customers. Being young and starting a consumer tech company is a lot like having unique industrial knowledge of your target customer.

If you look at how many early stage consumer tech companies were implemented - many of them also throw economics out the window when they are first starting e.g free video hosting and serving without a plan to charge money. I suspect that younger founders are more believable to VCs and investors when they pitch these kinds of ideas then more experienced founders. It's easier to think that inexperienced founders will wise up while thinking that experienced founders never did.