Quite entertaining though. And it is also a reality check for many who often need such an abrasive dressing down so as to ensure they don't carry on wasting their life on something which will clearly never work.
It certainly is entertaining for the viewers, but probably too soul-crushing for the participants themselves. I'm not too sure about the "something which will clearly never work" part. Really? Just because 5 investors think so?
Ok, some of the ideas pitched are really insane, and we all have bad ideas sometimes. I see it as a more positive thing to get a dressing down by people who aren't friends and family (who would never dare) as a result many people can get quite lost down the rabbit hole without such feedback, and lets face it we always think our own ideas are fab.
If you're going to pitch to angels, let alone the public, you have to prepared to be told your idea is crap. It happens to everyone. Getting over it is part of being an entrepreneur.
