Screenwriting is not the free flow of noveling. There are so many elements to consider in different formats. I guess that's the stumbling block: the structure. Each element is structured differently. Each element needs a different tone. In a screenplay, more than in a novel, you have to be all the characters and the director and ... well, all those parts. When I write a novel all I have to do is dream, basically. Which is like being a lot of characters. So, that, really, is one point of view: the point of view of the actors.
I sometimes peek over into my alternate life where I developed my singing, dancing and acting talents and lived the good life of a successful thespian who later got into directing and made enough profit to start a charitable foundation. That woman did a lot of voluntary traveling and was a lot braver than I. She was also happier and avoided the potholes I fell into in this life. I tried to write that story but it came out science fiction fantasy and was translated into something else entirely. This is why I write. To live those alternate lives. Really its about the grass being greener elsewhere. You know how much better the neighbors' lawns look from a distance.
I'd better start writing now or it will be six pages a day.