I suspected as much. Those are the fun ones I usually use for my weekly release adding (Friday/Saturday or later).
They are also useful for backfilling whole discographies like I did for the Redux trance labels a while ago. (Also caused thousands upon thousands of edits, can you guess the date? 
)
Initially it was just a multi-submit tool that would click the submit button and similar. Then I tried to make the above mentioned mass adding of whole discographies more efficient by automatically applying guess case when the language is English. It also depends on the new warning messages by @derat. Without them it probably would’ve been impossible.
Mainly to allow fine-grained control and not (accidentally) remove all kinds of relationships. Can be useful to more quickly remove spammy links (and real spam links) or incorrectly used relationships as they often appear on release groups (See MBS-11184, How to remove genre "is named after" release group relationship? or Limited editors can edit instruments?)