AFAIK there is no option to allow a website to read and write random files anywhere to my hard drive period. At most a website can ask the user select a file or offer one for downloading. In the future maybe it can be given a domain specific folder.

That's not true here. If I'm running a web server I'm going to need to give the app permission to read the files being served and access to the database. That something that never happens in the browser.