From 21w19a release notes:

Added mineable/axe, mineable/hoe, mineable/pickaxe and mineable/shovel block tags. Blocks with these tags can be destroyed more quickly with the matching tool.

shears.json and sword.json are missing from

/data/minecraft/tags/blocks/mineable/

despite several blocks being able to be mined faster with these tools.

Affected blocks:

#minecraft:leaves - shears.json
cobweb - shears.json & sword.json
#minecraft:wool - shears.json
#minecraft:carpets - shears.json - fixes MC-192893
bamboo - sword.json

Loosely relates to MC-225354, but different in that this issue has an affect on the vanilla game.
Related was closed because there are no blocks which require wooden, golden, or netherrite tools.