>>279650536
Maybe the main reason is that MC is just not interested with ending slavery.
Or the other reason why MC is not interested with ending slavery because doing that will only make things worse, for example kingdom allows slavery but also regulates it to guarantee a minimal wellbeing for every slave(like food requirements, how much work slave is allowed to handle, in many cases that kind of regulations allows slaves to leave slavery (for example by buying freedom away), kingdom abolishing slavery wont remove slavery, but it will be pushed into black market where regulations are seen as irrevelant and basically slaves just lose all guaranteed minimum needs and even option to leave slavery.