Sure, you could. But there's a ton of differences as you can see. It depends if you want automatic vs manual. And if you got the time to do manual, then I get that. But it's all about saving the users time, so they can focus on the core parts.
Dropbox could all be hosted on S3, but the ease is worth it. Etc.
Dropbox could all be hosted on S3, but the ease is worth it. Etc.