Agree, some people are destined to lose before they even begin.
I remember talking to a commercial RE a few years ago, who said after spates of redundancies they got cashed up people with no business experience and no idea, coming in looking for businesses to buy, based on having 'always dreamed of running a dress/coffee/collectors/icecream shop', etc.
He said some would appear to not want advice outside of their preconcieved idealistic picture of business, and knew they were destined to fail. He said he even tried to steer them into businesses where they were more likely to succeed but these types would reject them.
That said, I think some franchises rely on deception, like in the case of this person I knew. A friend (who is clued up on business and commercial stuff) and myself calculated some of her figures (some projected because it was a new shop) based on what she told us, and what we figured to be more realisic figures, and her purchase raised alarm bells. The other concern was she had total faith in what they told her. Yikes.
Business went downhill from day one, and it was all over about 18 months later.