How sad is it to earn your living and money from the cruel killing of the cock fights? I do not think anyone can sleep properly if they saw how cock fighting in being done and here we are talking about earning from this business whether is directly related to conducting this fight or indirectly through gambling on these cock fighting matches.
By the way, if cock fighting was a part of culture and popular among the masses, it would not be banned by most governments. We only see this game being played in certain backward areas and modern people have already abandoned this sports.
I'm not a fan of animal fighting as sport but it's always funny where people choose to draw the line. People use horses for racing, they flog those horses so hard so they can go faster, but that's okay. Scientist use different kind of animals for experiment and a good number of them die but that's okay. People pay millions to see two people in a cage beat themselves with all they've got in the name of UFC and that's okay. People even make fortunes from it through gambling and other ways but that's okay. It's cock fight that y'all draw the line. Funny.
Your reasoning may be valid as unnecessary violence is being as a sport or used for gambling purposes such as humans fighting with each other or people using horses to race but these things differ to Cock Fighting. Scientists used animals such as lab rats to test inventions that could possibly help humanity from danger such as Covid. People fighting in a ring such as UFC, MMA, and boxing involve unnecessary fighting to prove who's stronger however it differs too much on Cock Fighting as these kinds of matches are to the death where it ends either with a critically wounded chicken or a dead chicken which is why a lot of people are against it. The same line was drawn on other kinds of animal fighting like Dog fights which are now illegal in most or all places.