I don't even know if it's true that tar is less common than zip. I know zip is incredibly common, but truly, so is tar. In the UNIX world, _everything_ happens through tar. And as someone who almost exclusively operates in the UNIX world, I interact with zip files very rarely, while I work with tarballs all the time.
Just don't blame the format for a deficiency in your operating system, that's all I'm saying.