How come you're not supposed to including "We see" or "We hear" in screenplay?

I was too damn proud to writing my scripts. Until this great site revealed that you're not supposed to do that. That's not how I want to describe great story ever told.

Thankfully, I've corrected my screenplay right away. There you go, I've eaten my pride...

Mind you guys tell me why?

http://www.kriscramer.com/dont-let-these-problems-ruin-your-screenplay/

 

Not sure, since writing scripts and screenplays aren't things I do, but there are a bunch of different writing styles and theories and rules behind those writing styles and I guess the who "we see/we hear" thing is a part of it. But I'm not actually sure if there is a theory behind writing screenplays, although I think there would be.

 

It's not a problem now. I've corrected my scripts just now. Now I'm going to take a break from writing my scripts.

This site does makes sense. If I want my scripts to be a great story ever told, We see/We hear will not be part in my scripts anymore.

BA, I guess there's different rules of writing styles to it. I'm not sure if BBC wants to see that part in my scripts. Blimey..I will have to read some more scripts.