We never know, but if AD would indeed not available in game 6 then I believe Miami will have an edge and Butler would not be having a problem attacking inside, and Bam as well. But according to this article, Davis would play, so Lakers are still intact.
https://clutchpoints.com/lakers-news-anthony-davis-reveals-update-on-his-game-6-status-for-lakers/The Los Angeles Lakers were given a proper scare in Game 5 on Friday against the Miami Heat, with Anthony Davis appearing to have sustained a significant ankle injury that kept him on the floor for a a couple of minutes.
As it turns out, however, it was nothing but a minor tweak, and according to Davis himself, he should be good to go for Game 6:
Will AD be able to play at his fullest though? Now that Bam is also on the court, someone would have to guard him well too.
I believe he can still play, he played with pain in game 5 and manage to score 28 points and 12 rebounds, that doesn't seem look like he has a problem with his heel, and that update was coming from Davis so he is still good to go, nothing to worry.
Good, it's good news for the Lakers if AD can play because they really need him in the floor, it not they Butler will have his way going inside with no one to challenge. I just rewatch the highlights, it seems that the supporting cast of Lakers underperformed when it was needed. Damn, Danny Green's three point was clearly short, it was a well design play, and then Morris? WTF?
And the post interview, Butler was obviously very very tired, we don't know how long can he manage and play and bring Miami to another championship