Almost as if Oda does not regularly use destructive capabilities to hype up swordsmen...
Be it Mihawk's Iceberg slash. Or Zoro v. Golem Pica. Or Zoro cutting Onigashima's horn. Or Venus slicing Labophase in 1/2.
Cutting the moon, especially if done from the earth in One Piece, royally shits on all of the above btw.