Is this a troll comment? That's not even close to the same thing. Rsync and scp copy data from one computer to another in one direction. Scp would require you replacing entire directories. Both rsync and scp would need to be ran manually be the user.

Sshfs doesn't sync files. You go offline and your files are gone.

Most people's goal could be attained by a shared network drive is the point. "I have three computers at home. I just want them all to have the same folder that stays in sync no matter which computer I edit a file on."

It amounts to about the same difference as the difference between DropBox and syncthing (e.g. they are not close to the same thing either but as far as a certain use case which is that of the vast majority of users...they are the same)