Sorry, but don't project your needs onto others.

It is still useful enough to know if someone looked at your github repos when you're looking for a job. Typically this is useful when a visitor also hits other sites related to you like your Linkedin, or gets a link to your github from a printed resume, etc. It lets you know someone is interested and during a job search that can be useful information. It doesn't have to be only about "vanity", but maybe you're applying some kind of narrow view on the rest of the world.