I think you misunderstood me. I do use all 5 screens. I just don't completely fill every screen because there's no need for me to. I like organizing my apps on home screens into small, logical groups based on what I use most often. Apps I use on a day-to-day basis are never more than a couple of swipes away, and getting "lost" among 80 apps like you suggested isn't a problem because I have nowhere near 80 apps on my home screens.
If it's not something I use all the time, it can live in the app drawer rather than be in my way on a home screen.
Again, though, this isn't apples to apples with iOS. You're using several screens to store a few apps on each. But then you've got the app drawer full of apps. How many swipes do you have to go through to get through all of the apps in your app drawer? Is your worst-case actually better than an iPhone user who has all their apps on 5 screens instead of in the app drawer?
As for accessing things quickly, an iOS user can stick all their "social" apps in a folder on their main screen. The 5 screens can easily become a single screen, with 1 click to open any folder. Left and right swiping don't even mean anything here.
As I said, it's not Apples to Apples. Saying that iOS should have left/right screens because it works on Android doesn't make sense if the usage patterns are different.
Personally I only use one home screen on Android. I have my app draw available on a down swipe, and can scroll through the app draw (ie. not pages). I find it far eaiser to use the app draw even for things I use occasionally, as it is just a swipe and scroll away.
If it's not something I use all the time, it can live in the app drawer rather than be in my way on a home screen.