It is your iPhone. Use it the way you want to use it, you do not need to justify to anyone how you use your device. Initially I did that same thing, left the first screen as is since I wasn't using anything from it. Then one fine day I thought I could use some apps on the first screen and save a swipe every time I open the phone.
Nah, I've gotten used to the placement.
Besides, I actually do use the Apple apps on the home screen: Contacts, Mail, Messages, Calendar, Photos, Camera, Clock, Notes, Reminders, FaceTime, Wallet, App Store, iTunes Store, Apple Watch, Maps (in a folder with GoogleMaps and Sigalert). As mentioned, it's basically my "utilities" screen.
The Apple apps I don't use get shuffled to a Miscellaneous folder on the last page (at least before Apple started allowing deleting those shortcuts if not the app itself).
Like I mentioned, the apps I use the most are in the dock which is accessible from any page (Phone, Safari, ebook readers and frequently used utilities: Settings, Findy My, Calculator, Files, Dropbox).