Because you're telling a story, and I'm sure people fifty years ago would tell the same story differently if they were telling it to you today. Because the time is different. The film is the work of today's audience.
I took business classes as a back up but I made movies all the time. I would get my classes done in two days and then spend the rest of the time making my movies.
Just going along with this, what I did, or what I do is I imagine not being myself seeing it, but imagine somebody else who's seeing it for the first time.
Other times you can get showy for three minutes, and that's OK with certain films. But that isn't right with an Ang Lee movie, you have to fit right in. You have to understand Ang, respect him and be part of the team and not be in charge of it - he is in charge of it.