Game 2: Point misses the last ~35 minutes, Lightning score one goal.
Game 3: Point doesn't play - Lightning score three goals
Game 4: Point doesn't play last ~10 minutes, Lightning score zero goals with a goalie in net (had a 3-1 lead so this one is a little easier to disregard)
Game 5: Point doesn't play - Lightning score one goal in ~92 minutes of hockey
35 + 60 + 92 = 187 (+10 if you include Game 4)
187 minutes of hockey, or just a little over the equivalency of three games worth of play...Lightning have scored five goals in that time. They are obviously already without Stamkos. When either Kucherov or Point is also missing, there is ZERO goal scoring ability left on the roster. If it wasn't Kuch or Hedman last night, nobody was going to score the winning goal. Lord knows Kucherov had his chances and could've had a breakaway if Cirelli had pulled the trigger on a pass quickly enough (and he had the opportunity; he saw Kucherov and had the puck, but he was a second late getting the pass away and the chance was gone by then). But if it's not going to be them, nobody else can do it. The second line is completely useless. The third line is certainly a good energy line but they aren't much for creating goal scoring chances. None of the D's other than Hedman can get a shot through.
Having missed Game 3 and suffered a re-aggravation of his injury which caused him to miss Game 5, there's no reason to assume Point will be good to go in Game 6. Hopefully he is, but there's no way you can say he will with any kind of certainty. And if he can't play in Game 6, then the Lightning are all-caps f***ED. Because, if this goes 7, with their history of collapsing in the Conference Finals, the Islanders are winning that 7th game. Winner of Game 6 wins this series, and the Lightning can't win without Point. Can't win because they can't score without him and, obviously, you can't win if you can't score. Vasi let one 100mph one-timed slapshot beat him last night, and that's all the Islanders needed to be assured of a coin-flip overtime game. Vasi is the starting pitcher on a team that can't score any runs and knows that he has to be perfect or he's going to end up losing, and that's a ridiculous amount of pressure for a goaltender to have to deal with. It broke him in 2018 when he cracked under the pressure in Game 7 with the Lightning in a goal scoring drought then, and I could see the same thing happening here if it continues.
TL;DR - Lightning need Point in Game 6 or the Islanders are most likely going to win this series.