So whats unethical on that?people.tend to find something to make fun and insects are.mostly bringing us itchiness and bites so theres an instance that we use them as joyful materials or sometimes gambling instruments, and who cares about their intelligence? Would that bring you something to become happy?lol
Insect fight is popular in some countries, it is gambling and I guess you are also aware of cock fights.
Yeah cockfighting is a very popular gambling game as there was a huge community for them and I believe there is also a competition or event in which they called Derby .i also know about Spider fighting with bets but i guess what OP is pointing is another sets of insect or i think its about flies?well what matter the important thing is thats cool and i wanna see one of those in actual fighting