Yeah, I'm sorry but this is flat out false. Those diseases affect millions of people and claim thousands of lives every year. The drugs curing them are ABSOLUTELY needed.
Otherwise, yeah, the Kraked are using those drugs to bargain with other countries and obtain what they want. Fair is fair. Morally speaking, it's dirty af and that might be the biggest indicator of them acting as a country: morality and politics don't mesh well in most countries on Earth, Krakoa is no exception.