I manage my changes from my local so I can use any editor I want in the mean time this script uploads all my changes to development server.
I think this is the general use case.
Using this technique you're stuck, because only one person can develop on the same project without interfering with each other. Also, git-hooks are not /that/ hard to use, you should really look into it, as it solves two problems: You have version control and you have easy deployment.
We have development servers for each developer like 'username.dev.myapp.com' so you don't have to install the application on your machine. Most people work on the server using 'ssh: screen/tmux - vi/emacs', but I want to work on my local because it's faster. So I needed a system to upload my changes to my remote box. and commit my changes from local.
Most companies use this technique so that you know how your code will behave on production while developing it, because it has the same exact architecture.
I hope it's more clear now. It's funny that you would think I don't use a version control system :) what year is this.