To clarify, my previous post meant the Kidd-Palmer maps (not the Mar Del maps), however, my point applies to the latter as well:
You can take the shapes of the islands on both the Kidd-Palmer maps and Mar Del maps and find them closely resemble a dozen (if not more) real islands. As an example, Richard Knight was convinced the island on the Kidd-Palmer maps matches Hon Tre Lon; Rupert Furneaux, the Providenciales, and so on. The shape also vaguely resembles early maps of Nantucket. Any similarities are coincidental.
Compare the images you posted:
View attachment 2219547
To Hon Tre Lon:
View attachment 2219548
Why should the chart of Juan Fernandez be preferred over Hon Tre Lon? For the record, I do not think the Kidd-Palmer maps have anything to do with Hon Tre Lon, or Juan Fernandez. I am merely using Hon Tre Lon as an example to highlight you can find many different similar shaped islands and the shape similarity is purely a coincidence.
I am not remotely convinced Wilkins Mar Del maps are related to Juan Fernandez island; you state:
Again, I would say this is coincidence; in fact, the shape is not a very close match (Mar Del island is wider at middle-bottom):
View attachment 2219550
There are admittedly "hills" in the same location (on left of both maps) but that's about it; trees are not in a similar position. No matching desert, palms, wrecks, etc; "rock(s)" appear on the right on the Mar Del map, but on the opposite side on the other map. There are far more differences than similarities between these maps. Furthermore, Wilkins (1950) seems to contradict your claims.
According to Wilkins (1950):
View attachment 2219551
I will quote the relevant text:
"However, my London published was insistent on having a chart. Now I have some knowledge of pirate charts of the 17th and 18th centuries and am familiar with their peculiar style and cartographic detail. I sat down in my den and
out of my imagination I drew a chart such as a 17th buccaneer might have produced. I modified the outline of the island as I remembered it from the real Kidd treasure chart belonging to the collector. I made my island about 3 miles long by 2 miles wide running NE to SW., and marked it South China Sea. I incorporated as much detail from the collector's chart as he would allow and I put in such tropical features as coral reefs, coco-palms, a landing place, hills, a 'death valley', and at the bottom added the initials of Kidd and the date 1669. I thought it was obvious that my island must be in the tropics. I even inverted he compass points giving a true north, geographic, not magnet, which was not in the collector's chart. I added a legend of the cache which was totally different from the original.
It was meant only as an illustration for my book."
This contradicts your earlier comment:
If you read Wilkins though, what he actually says is he made up the (legend) instructions "only as an illustration for my book".
Wilkins made up the instructions on the Mar Del maps. His own article even summarised the map was from his imagination: "The author
drew up a treasure map out of his imagination." The Mar Del Maps have nothing whatsoever to do with instructions to a buried treasure on Oak Island, or anywhere for that matter since Wilkins was clear he made the instructions up out of whole cloth.