Let's face it,
- the professor could build a radio out of coconuts and so many other stuff but could not build a raft.
- They could build 4 huts in no time but they could not build a couple more so that everyone has their own place.
- They all catered to the rich folks as if they traveled with their millions.
……

I think after the first couple of days on the island they all found the plants and where wasted from that time onwards :)