Craftable gunpowder in peaceful mode (saltpeter)

This is only a solution to the gunpowder in peaceful mode problem if blaze powder is made obtainable in survival. Gunpowder is made in real life by mixing nitric acid (saltpeter), charcoal, and sulfur, so why not add that to Minecraft? Bat guano in the soil eventually turns into saltpeter, so why not let guano be dropped by bats and refined into saltpeter? Sounds good to me! 

- Add Guano, dropped from bats every 1-5 minutes, similar to chickens dropping eggs

- Add Guano Bottle, made from bottle and 2 guano

- Saltpeter Ore, Block, and Dust;

Saltpeter ore: semi-rare, y40-256; 1-3 dust per ore

Saltpeter dust: 9 dust -> 4 blocks

- Saltpeter Bottle, made from water bottle and 3 saltpeter dust, or by brewing bonemeal into Guano Bottle

- Refined Saltpeter, by brewing glowstone dust into Saltpeter Bottle 

4 refined saltpeter + 3 charcoal + 1 redstone dust + 1 glowstone dust = 4 gunpowder

It's slightly more difficult and tedious than killing creepers, but if blaze powder was somehow obtainable in peaceful, it would be well worth it. Maybe something like a very rare ore with blaze powder in the nether that drops 1-2 powders? Idk sounds cool