Sword Won't Break Any Block, Will Only Kill Mobs

I was playing my creative world and was going to break a block with my (Enchanted [Sharpness V, Looting III]) Diamond sword, and it just displayed an effect like trying to break Bedrock in Survival, but when I chose a pickaxe, it worked fine. Is this intentional? If not, will it ever be fixed?

(I know swords aren't meant for digging but it's very inconvenient to use two tools in a hotbar that could use a lot more spaces.)