As @QW mentioned there is a lot to unpack in what you said. Both @QW and @Derek Ross already mentioned a lot of the benefits of Bitcoin so I'll concentrate on offering insight into your last question. In some ways you could say the same thing about anything else in life such as life advice. Just because you can get something for free, doesn't mean it has no value. The thing with #zaps is that there are no rules and that's the beauty of it too. It becomes a free market dynamic where anyone can decide what they think something else is worth through a one-way public benevolent act. Like kickstarter but on a very granular level.