Players can hear sounds from blocks surrounded by wool

Steps to reprduce

1. Have sound in Minecraft and volume up.
2. Open Sound Test.mcworld
3. Press the button.

Expected result

You do not hear the piston inside the wool because it is covered by wool.

Observed result

You hear the piston.

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Wool dampens the noise for Skulk Sensors, but when I build redstone builds and encase them in wool, I can still very clearly hear the clicking noise from droppers. If noises from droppers, pistons, noteblocks, etc cannot be dampened, how am I supposed to greifproof my builds in multiplayer servers, as it would be very obvious that there is something there. Encasing something in two or 3 layers of obsidian won't stop someone with a diamond pickaxe.