It's an annoying thing common to a lot of technologists. They (we?) see a product which solves a problem, then imagine some hacky way to set up existing tools to half-way solve a similar problem in an easy but incomplete way, then make fun of the product for existing when the hacky solution exists. The Hacker News comment on Docker's announcement post comes to mind, where a person makes fun of the concept when you could "just" run rsync in a cron job.