Maybe because no one wants to listen to him or no one thinks he is important?
Answer: They drew his chariot when Achilles left home for the Trojan War.
Explanation:
The horses, who were immortal, were given by Poseidon as a gift to Achilles's father Peleus upon his wedding to the goddess Thetis: magnificent racing stallions, gifts of the gods to Peleus, shining immortal gifts. Peleus then gave the horses to Achilles to draw his chariot when his son left home for the Trojan War.
Responsibility is important because is no one had responsibility no one would be alive. Imagine if two people had a kid and neither of the parents were responsible, the kid could grow up a terrible life and not be mentally healthy or the kid could unfortunately die. Responsibility is needed with everything. You need lots of responsibility for a pet, you need to feed and water it, and make sure it is healthy.