Why do American Schools focus so much time on the indicative tense, when in reality, the subjunctive is used so much?

Why not teach the subjunctive FIRST and then the indicative???

I have been catching up on my subjunctive terms and I realize that I use them literally every second sentence. In addition, spanish dramas always use them. Native speakers also use it a lot, somewhat, and or never.

Either way, why did my american schools focus literally on JUST indicative and leave the subjunctive in the dark? I'm guessing its very hard for second language speakers to use and guage it...but then again, it must be learned. Why skimp out on it?

Any thoughts?