Cock fighting is the only game which i believe has the 50- 50% fair change of wining No interference from outside. I enjoy seeing the people screaming and cheering for cocks to win.
I feel bad when cocks kill each other with the blade in their claws.
You are right this do really have that 50-50% chance of winning yet you do only have two options of choosing a fighting cock.
For more "sabong" definition and its history then its really worthy to read up this this article
http://www.stuartxchange.org/SabongIt might be brutal on your own sight but for the people who do have this kind of hobby or gambling activity doesnt really care at all.
It's not brutal since cock/rooster is considered as primary consumer which means they are meant to be eaten by secondary and ternary consumer in which we belong. Although it sounds unfair for them but that's a fact and any single person isn't punishable by the law no matter what he do to that poor cock/rooster.