Something I noticed in after many rewatches of Once Upon a Time in Hollywood

In Once Upon a Time in Hollywood, Steve McQueen talks about Roman Polanski and Sharon Tate’s marital situation and her history with Jay Sebring. McQueen says, “Jay loves Sharon. That's what's up. And he knows, as sure as God made little green apples, that one of these days that Polish prick's [Roman Polanski] gonna fuck things up and when he does, Jay's gonna be there.”

I may be reading into this a little much (or maybe this was obvious) but I just realized that this quote may have more importance than I had initially thought. At the end of the movie, we know that Sharon Tate ultimately survives the Manson murders in contrast to what actually happened. Is it possible that this quote from Steve McQueen may have been Tarantino’s thoughts for how Polanski and Tate’s marriage would have worked out if she had survived? Especially since Polanski has turned out to be an extremely awful person, this may have been the thing that McQueen was pointing to when he said that Polanski’s going to fuck things up one day.

Let me know your thoughts.