The stories were far more about memorising the proper rites of sacrifice than making logical sense but in ancient Greek traditions of sacrifice it was very important that all participants consented to the sacrifice and it was believe that the animal "consented" to the sacrifice.
Also, note that such animal sacrifices were the meat were shared with others was often the only way for some poor folk to eat any meat at all.
It bears some resemblance to community barbecue or somewhat like the Muslim tradition of Qurbani during Eid ul Adha.
So sharing the sacrifice fulfilled a very important social function.>>104536612
Several titans had temples and it was not strange to worship/propitiate them.
Rhea, for instance, was widely worshipped as mother of the gods.
Prometheus was directly worshipped at Athens himself.
Claiming that one side or the other is "bad" is a misunderstanding of the cultural context.
In the Illiad during the Trojan War there are praiseworthy heroes both on the side of the Achaeans and on the side of the Trojans.
Likewise, there are gods on both the sides of the Trojans and the Achaeans but that doesn't mean that the Trojan-allied gods are less gods.
If you are a musician and one day you play in a village that had a feud with another village and then later on you play in the other village you quickly learn to rewrite the stories so both sides have heroes.
If you are an Egyptian and you like a popular Greek song you rewrite the song so that the Egyptian gods have praiseworthy qualities too.
On a /co/ note, many people like to see Billy fight Superman but that doesn't mean they think of either as a supervillain.