1. I'm not sure you understand what running water means. It's not water that flows down a river, it's water that comes from a tap. The whole point of running water is that a utility delivers it to your home, regardless of whether or not your town is in a rain forest, or the middle of a desert.
2. You'll die in three days without water. You'll probably be healthier if you spent three days without Facebook.
3. I can't collect water for myself where I live. I suppose I could walk down to the lake, and manually bring up a few buckets of water, but it won't be safe for me to drink. I suppose I can also go buy bottled water, at a ~million-percent markup. There is no economic alternative for me to get water, other than through the water pipes laid to my apartment, by my water utility. I am a completely captive customer for my utility. My water utility has monopoly control of special-purpose one-of-a-kind infrastructure that is used to deliver water to my apartment. That is why my utility is regulated.
4. Unlike with my tap water, there are plenty of functioning alternatives to... Whatever it is that Facebook does for me. If Facebook shut down tomorrow, my life would be mildly disrupted for a week or two, and then would go on with little change.
On the hierarchy of needs, we have air at the top, followed closely by water, shelter, and food, followed at some distance by electricity, and way down the street, that we can barely make out, by grabbing a pair of binoculars, we will see 'Facebook'.
You'll very quickly discover why they are not at all alike.