Not really a waste of time to take care of any animal, it is a problem of why are you taking care of them. It is like if you take care of a cow or a pig, the purpose is to eat it, so not really good nor bad just an utilitarian purpose. A different thing is treating the animals to fight and the like, which in my book is pretty much a bad thing.
And this doesn't just happen with roosters, which are staged to make the chickens fight. However, there are many other types of animals such sheep, fish, bulls, and so on. Indeed, I also realize that fighting is an animal instinct, but in this case animals are forced to fight just for human pleasure. Likewise with several other types of animals. Humans catch them from the wild and educate them, sometimes humans do cruel things so that the animals they catch can be tame so they can later be staged. And it is done for money and human pleasure
All of these are the wrong practices, making animals fight, catching and keeping them in zoos, taming them, and then using them for staged shows and stuff. all just for money and pleasure. A lot of animals that we see in all these things deserve to be in the wild, free, with their families living their lives the way they are meant to, we catch them and keep them with ourselves forcefully only so that we can see them and have pleasure and flex that we have dangerous and unique animals.
Taming animals that are meant for that is a different thing, like dogs and cats and other animals that are suitable for such things. You can have a dog that you love, so you train him, teach him a lot of things, and then create a YouTube channel or something and put his videos up for others to see, that's a good thing, but if you use it for other things which are harmful to him and he is forced to do it, that's totally wrong.
Literally loving them, taking care of them well, in other words, taming them is very good, be it cats, dogs, chickens and others, if you treat them like that, it is a good thing.
But what can I do, there are a lot of people who fight for their own pleasure, even though they are criticized by several parties, such as animal care associations, they still exist and have quite a large community, as well as in my country there are also many communities about cockfighting. .
But unfortunately, many people consider this to be cultural, so even though this is not normal, there are still many people who support it, and do it openly.