Having been to Cape Inscription on Dirk Hartog Island I would venture that it's no surprise he didn't see much to inspire him and sailed away and those of us on this side of the continent are not speaking Dutch. It's a pretty unforgiving environment.
The interesting part about the island today is that there is a project to return it to more what it would have been like when Hartog visited.
Decades as a pastoral lease and the introduction of feral cats took a toll on the environment and the mammals that lived there.
But after years of negotiation it is now a national park, except for an area retained and used as a resort by the last lessees, the Wardle family.
The sheep and goats are gone and after a concerted effort the cats were eradicated.
Scientists indentified about 10 small mammals that used to found on the island but had disappeared. Now they have embarked on a project to reintroduce them. Many are animals under threat on the mainland. Think Noah's Ark. The first translocations have gone well, the animals are breeding and the vegetation is recovering.
There is a wealth of info here if you are interested
https://www.sharkbay.org/restoration/dirk-hartog-island-return-1616/
As the vision shows it's a spectacular place. The ferry cost and other issues will always limit the numbers who visit and that may be a good thing.