User blog comment:OfficialElys/VOCALOID Ships/@comment-216.19.117.7-20171128171625

Because some people just like it. They like visualizing the characters together or listening to them together. Some of the time, the "listening" bit is not even a "ship", they just sound good. Like I personally like Ling and Longya together because they sound good, but never would I ship them (especially since they're siblings in canon, no thank you-). Other times, I like Meiko and Kaito together both visually and through singing, and ship them too.

It's a personal preference. People either do it or don't. And of course, with shipping, you've got to have the dumb fights that come with it; this happens to every fandom.