And this is why the "50-shades of wifi off" of ios 11 is so idiotic.
Don't have iOS 11 yet so don't actually know how many steps I need to take.
If you don’t have a 3D Touch phone you have to open Settings and Navigate to WiFi which is right at the top of the list with Bluetooth and Airplane Mode.
On the subject, one swipe + one press using control center is really much faster than finding the settings app. For me it takes at least six actions to get to the switch: press home twice, open a folder, scroll, open settings, click wifi). Even if you keep settings in your home screen that's at least four clicks/touches away.
You can also just ask Siri.