Pretty much. It's like listening to two people trying to have a detailed conversation about a book, but one of them didn't read it, and read a review of some other book instead, and the second didn't read anything at all, and is just confabulating.
At the risk of being nerd sniped, I wonder if that's true or false. The intuitive answer is with higher sea levels more land would be underwater, meaning the land area has decreased and so its perimeter should decrease; in some cases lowlands like Florida or islands would completely disappear. But low lying basins flooding and turning into bays might offset that...Call XKCD.
Aside from that, if all the current waterfront property goes underwater, then previously undesirable land will slowly become more valuable, once we know where coastlines will land (it depends on when and at what temperature warming starts to flatten out). When that happens, it becomes another avenue for wealth transfer to the rich.