The thing is, those ships operate for quite a while. A giant laugh is fine and dandy, but it's also something people quickly forget. After that, it just ends up looking idiotic. I don't think that scientists and sailors for whom this ship is more than an abstract concept would appreciate their ship being named for a stupid joke. Especially considering who the runner-up was. The "general public" took a honest initiative and ran it into the ground. Humor is good, but the way it is applied also distinguishes good adult human beings from children that yet have to grow up. In that case, most voters acted like children.
TBH, I'm waiting for a day some two-bit YouTube celebrity jokes about being elected for president and ends up getting the office via write-in votes. Seeing how well Trump is doing lately, the day might not be that far off...