Categories and leaderboards are made to compare your run to other runners, aswell as to compete. Leadersboards are also for having a clean and nice way to show what ways people play a certain game, in our case as speedrunners, how we play the game fast, or how fast a game can be.

As for the "current patch" / "other games have it" Yes, this is true. Some games have these categories, to this point in Aragami's life, nobody has wanted to do this, therefore it's not a category.

If you won't run this game without a category of your own, then there is no point. But if you want to play the game and learn everything about it, submit your time in the current leaderboard, add a comment saying that it is a "current patch" run. And eventhought this game is not popular, mabye, just mabye, you get some people who want to do that aswell.