Even if you ignore the fact that Blizzard owns the rights to the code. Which you shouldn't, but some people here seem to think that's alright.
EVEN IF you ignore that, SC is still televised in South Korea. Releasing that code could affect the integrity of the competitive scene for SC.
But you won't accept that because this isn't really about what's fair, it's about what you want.
https://en.wikipedia.org/wiki/Professional_StarCraft_competi...
> Over US$4,000,000 in prize money has been awarded in total, the vast majority of which comes from tournaments in South Korea.[3] For several years after the release of StarCraft II, competitive StarCraft: Brood War was no longer televised. However, in early 2015, the game returned to Ongamenet's televised lineup.