I've noticed that you view yourself as the arbiter of all things right and true in Star Trek
And you don't? Isn't this why these argument just go on and on. No one will win. Neither of us will convince the other that what they've considered to be true for several decades
is not true.
When I saw ST II, I saw the Genesis Device draw material from the nebula and create a planet. Later, this interpretation was confirmed (for me) by reading the novelization, "making of..." books and magazines, and the script. I also saw comics and novels, over the years, that revisited Regula One and the Genesis Cave. Also a recent IDW adaptation in comic form.
Until a few weeks ago, I don't think I realised there were fans who thought that Regula became
the Genesis Planet.