You could pick apart everything I say all that you want. It's not going to change the fact that Time Machine won't let me pick only a few individual files when restoring to a new system.
I think where you are getting hung up is the word "restore."
You are correct that if you boot to a TM backup disk and click the restore button, that is all or nothing. It restores everything to the new drive.
But what chown33 is saying is you could for example buy a new Mac and turn it on and setup your account, then attach the TM disk and look through the backups and pick for example just your iPhoto library to move over (restore) to the new account.