This is very real. A friend of mine started a company with over a million in seed funding with what basically amounts to just an idea. Years later, the company isn't doing that well in terms of sales/revenue, but they still manage to raise money because they have a couple obvious acquisition targets. It seems crazy to me to throw millions of dollars at a company with the hopes that one of maybe three or four megacorps in the industry will acquire them, but investors buy into that, and that's all that matters.
Seed and Series A is investment in the people always. They assume if the product doesn't work the team will pivot until they find something that does. It sounds to me like your friend failed to pivot when needed.
Not even. I'm seeing seed and series As/Bs on unproven teams of recent graduates with no experience in the field where the "start up" operates. No business plan, no prototype, huge regulatory walls to climb.
Funds make money on failed investments too. I'd be happy to throw away someone else's money, if I got to keep 20% as a management fee - and a slice of the profits in case one of my lottery tickets is a winner.