So then why is it getting fragmented such a problem? Obviously it's not doing a good enough job.
What's more the issue is that SE's install makes a partition by itself, then creates files in that partition that do not complete, but still read as taking up X amount of space. Since the memory sectors of the file segments has to be contiguous, if a partial file exists, it's left there in place and it re-uploads to the next segment.
In essence, SE has left a ton of trash files that the HDD utility disk can't remove because it's not allowed to violate the install's memory space, and the game itself cannot expand the partition to allow more workspace, nor have they provided a routine whereby the software deletes bad files.
In the end, the issue is that SE never considered creating a clean-up routine for bad update files...