This is patently false (I have just done the very thing you said, then confirmed that the wifi was in fact still on).
I think this whole argument just lends more support to the idea that Apple is being deceptive with this UI.
I think this whole argument just lends more support to the idea that Apple is being deceptive with this UI.
However, after all the feedback here I did some testing and it appears the GP was wrong: The submenu obtained by 3D touch/long-press doesn't actually turn WiFi off. My apologies for repeating his claim without backing it up.