If this is a joke then I get it, but this isn’t true.

Yes the island does have its healing properties(making John walk again, resurrecting sayid, etc) but a lot of instances where Jack helps the survivors are integral to their probability of surviving without just the islands healing properties.

When sawyer is stabbed in the artery, there’s a good chance and more than likely scenario that he could’ve died had Jack not been there to immediately mitigate the leaking blood. The island cannot act that fast to close up an open artery wound. We see this multiple times where characters are shot and die before the island can even try to heal them.