The reason they have to manipulate the audience is because people look for validation and so feel good when other people react to things in the same way as them. If another equally funny show has a laugh track and you don't, yours will likely be less enjoyable to watch unless it's a specific form of humour which benefits from not having a laugh track.

Basically a laugh track can't save a terrible show, but it can manipulate people into finding a mediocre show more enjoyable to watch, but a mediocre show will make people laugh organically at least a few times anyway.