Ah, I see your point now - thanks for taking the time to spell that out for me.
TBH I'm still not entirely convinced that the Romulan connection is
that much of a stretch, since the planet is inside Romulan space (or at least it is by the time of the 2260s). However, at the end of the day this is just a theory without any onscreen evidence so I'm happy to trade it in for a better one
If you want a better idea I think I can come up with one. Wait a minute. I'll be right back.
I found my last paragraph in my previous post number 59:
...And no doubt some of the people who spread the legend of the Edenic planet Eden in the Romulan Neutral Zone were people who wanted to restart the war with the Romulans. "Those dirty stinking Romulans, they stole Eden, the most perfect planet in all the galaxy, from us."
Let us suppose that one shore party once landed on the beautiful planet later called Eden, and perhaps only one person in it noticed the acidic plants. Then they were recalled to their ship because a Romulan ship was on the way. The Romulans pursued their fleeing ship and damaged it and maybe killed some of those who were in the landing party.
And nobody every returned to that region of space due to the long and bloody war and the establishment of the Romulan neutral zone.
And the person who knew about the acid and deadly nature of vegetation on the beautiful planet had his own ideas of what paradise was. For him paradise was living in a beautiful climate controlled palace in a beautiful high tech city and being waited on hand in and foot by hordes of robot servants and being totally idle and spending his time watching or reading his favorite stories. He wouldn't have wanted to work as hard as even south sea islanders did picking fruit and catching fish. And he couldn't stand the heat on a tropical island.
So whenever he heard someone wish to live in a tropical island paradise he snorted with amusement, knowing that person's idea of paradise was closer to his idea of hell.
And then he went to a reunion with his old crew, those who had survived the Romulan War. And someone who had been in the landing party and seen the beauty of the planet, but not suffered from the acidic plants, was talking about how beautiful it was and how it would have been like paradise to live in, and he almost told him that the pain would have been more like hell, but didn't get around to it.
And later he had an idea, and went to the leaders of the political movement to restart the war with the Romulans, who believed that the Romulans had not been punished enough, and wanted to resume fighting and kill more Romulans.
And they started a publicity campaign describing the beauty and the balmy climate of the lost planet, which they named Eden, hoping to stir up a desire to conquer that region of space from the Romulans and find Eden.
"Those dirty stinking Romulans, they stole Eden, the most perfect planet in all the galaxy, from us."
And the man who knew the truth about the deadly poisonous plant life on Eden felt it wasn't wrong to trick a bunch of fools into fighting another war with the Romulans over that false paradise, because he felt that anyone misguided enough to want to live in a primitive tropical paradise deserved anything bad that happened to him.
That pro war movement never succeeded and eventually fizzled out, but the legend of the paradise planet Eden remained a part of space lore for generations.