why not? only because its called 'Raft'? It still has a lot stuff with a raft.
There shouldn't be islands in Raft. It defeats the purpose of a raft in total. If you found an island with a healthy amount of food, you have a water purifier, and enough trees for a house, your basically set for the rest of the game. Zombieslayer008 is right, it's called Raft for a reason. If islands were added, this would turn into a regular survival styled game. This game is different, and I think we need to keep it this way.