Whatever you think this is for, I promise you it's more ridiculous than that.

Yeah, it totally can. It's become such a core thing that the next batch of boards I order will have the I2C headers on the main board too so you don't need to use that adapter board.
(I guess you don't really *need* to use it now, you can just assign the I2C lines to connect somewhere else.)

omg finally, the feature everyone wanted on the OG Jumperless like 2 years ago. Wire colors on the breadboard now match the ones you set in your @wokwi.com project!

men will literally do whatever this is instead of using a slip ring

I don't remember ordering this JDI MIP display (like an off-brand SHARP Memory LCD), but drunk Aliexpress Kevin really knocked it out of the park on this one.