I think Attenborough did a documentary a while back on how the introduction of invasive cats, rats, snakes and even spiders would wipe out local fauna on these islands because the local fauna weren't used to predation. Pretty interesting stuff.
Also, the local population of these islands are suffering extreme health issues ( primarily obesity related ) due to all the junk food they are eating.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1533815/
The nature is beautiful for sure, but it isn't all paradise. And we haven't even touched on the impact of global warming on these islands and the fact that some of these islands might have to be evacuated in the next few decades.
https://www.businessinsider.com/islands-threatened-by-climat...