Some instant-break blocks have "hit" sound events, but others do not

Certain blocks, such as slime blocks, honey blocks, and several types of plant, possess dedicated sound events for the “process of breaking”. However, these sound events can never actually be encountered in normal gameplay since the blocks that they’re associated with always break instantly regardless of item or player state. The only way I’ve managed to encounter them in practice, besides /playsound, involves giving yourself Mining Fatigue of level 86 or higher and then punching the block.

In contrast, there exist other blocks in the game that break instantly which have no associated “hit” sound whatsoever. Punching these blocks under those conditions will produce no audio.

Blocks which have no "hit"/"breaking" sound event:

• Dried Ghast

• Red Shrub

• Cactus Flower

Blocks which have a sound event which can only be experienced through Mining Fatigue:

• Azaleas and flowering azaleas

• Cave vines

• Cherry saplings

• Decorated pots

• Frogspawn

• Crimson fungus and warped fungus

• Hanging roots

• Honey blocks

• Leaf litter

• Nether sprouts

• Leaf litter

• Pink petals and wildflowers

• Crimson roots and warped roots

• Scaffolding

• Small dripleafs

• Spore blossoms

• Weeping vines and twisting vines

Expected results: either instant-break material types would have no hit sound, or all of them would.

Actual results: all of these sound events exist, practically unused.