If the Isles are a bubble team then the Penguins are a bubble team with 4 games in hand that don’t have a legit shot at anything as well. And that’s without factoring in Washington too.
You simply can’t have the argument both ways. This is no more a lock for Washington and Pittsburgh, as it is a conclusion to the Islanders season. All 3 are bubble teams with zero guarantees until the end of the season.