That is a good point. I know now when I visit a project on Github that I am seeing the latest version of all files, but that is only because I'm already aware of how git works.
Depending on what the default branch in GitHub is set to you might not be viewing the "latest" version of the files. i.e. the default branch is `main` but all development happens on a long-lived `dev` branch that is only merged into `main` once a month.
Someone who doesn't know what version control is will also just assume they are seeing the one and only version of the files.