What if Fleury didn't put any of those teams on his NTC? That's about as valid as your question. In reality, absolutely no one on this site know who Fleury put on his NTC. You can't use that as an argument for why Fleury can't be traded because it's pure speculation. He could have put any teams that would be interested in him on his NTC (if he doesn't want to be traded), or he could have put teams who have starting goalies already on his NTC (if he doesn't want to be traded and be a backup). Or he could have put a bunch of bad teams on his NTC (if he doesn't want to go to a bad team) or he could have put a bunch of Canadian teams on his NTC (if he doesn't want to play in Canada) or he could have put a bunch of Eastern teams on his NTC (if he doesn't want to play against the Penguins with regularity). In reality, absolutely no one knows.
And to your question, he could still be traded to Vegas. So there's that. If Fleury puts those 12 teams on his NTC, he'll either need to waive to go to one of those teams, he'll get bought out or he'll be forced to waive his NMC for the expansion draft (with a threat of a buyout, I could see something like this happening where the Pens also pay off Vegas to not take Fleury). However, that's a really specific scenario and it's one of many scenarios that could happen.