It doesn't make sense. Can you guys please explain it to me? I want real life experiences when it's actually convinient to quickly disconnect from current Wi-Fi.
I'm at work, where my phone automatically joins the wifi, as I'm fine using it most of the time. But I want to disconnect for some reason. Maybe it's slow during peak hours, maybe I like not having IT know that I'm browsing NSFW subreddits, maybe I want to use services that the network at my work don't allow. Whatever. So I disconnect by a press of a button.
Now I don't have to worry about not connecting when I get home, because I forget to turn it back on. Or if I want to use airdrop (which doesn't require a wifi network, but does require the wifi to be turned on, as it uses p2p-wifi).