I don't like it because I feel my vague ideas "disappear" when becoming concrete. It feels like trying to project a multidimensional creature into 2D; you inevitably lose some of it. In contrast, in my brain I can rotate or pinch the idea anyway I like and even turn it into further ideas.
Well that's the gist of it, and that what makes artists admirable. It sounds like you have a preference for fantasy over reality, and ultimately it's up to you if you feel your ideas are worthy of the friction of bringing them to life satisfactorily.
An idea is like a seed, you need to care for it in order to bring it to fruition, and you might have to face many frustrated attempts before you're successful. But if you don't then they're worth pretty much nothing.
That's exactly the point. You can do that in your own head, but you can't communicate that to other people. For every amazing thing you've ever seen in a movie screen, imagine how much MORE amazing it was in someone's head before that. But you can't capture that in full.
And, much like the scientific method can take something that "everyone knows", and turn it into the basis for a branch of science, the process of getting this down in paper forces you to document all the nuances in your head, making that final idea even richer and fully consistent.
I enjoy writing but I also feel this strongly. For me it feels like writing is forcing me to carry on one particular train of thought much longer, and in a more focused way, than I do in my head.
Thoughts sometimes have a parallel aspect to them, and since writing cannot capture this, it's necessarily a pale imitation. But that's what makes it challenging, and rewarding if I'm actually able to get something across.
