[Suggestion] Mushroom Blocks could be able to be shorn

When using the Mushroom blocks in in vanilla Minecraft, it has always been difficult to build structures similar to the natural Giant Mushrooms. The obtainable blocks provide fully red, fully brown, full stem, and full flesh, but no combination blocks are easily accessible to the everyday player.

In 1.13, the ability to strip logs of their bark was added, by right clicking with an ax. I wonder if it might be possible to add the ability to strip individual sides of the mushroom blocks, with say a pair of shears, to expose the flesh of the mushroom when modifying or building your own giant mushroom structures.

This would provide greater control over the types of shapes we can build with when making mushroom-themed structures, without the use of worldedit or /setblock or whatever, and allow more people to make more cool things with less work, and in vanilla survival.