That because you, personally, don't understand why you would do such a thing therefore said thing is invalidated.

It's lazy.

Additionally taking that point of view outs you.

Much like how when I was 16-23 and creating things on the internet when there was only 100MM users and people were wondering why anyone would want to spend all that time on the computer.

Or ever make a webpage.

Or put their information online.

Or meet people you've only emailed.

Or use a credit card to buy things.

All in all, the answer is always: there are 7 billion of us out here, the world doesn't revolve around you, grow up.