Cassandra curse

What if people listened to and trusted Cassandra. Would the world be the same would people have a better or worse life? Cassandra was a god like the greek gods but she was different she had a blessing, she called it a curse. But if it was a curse how could she have used it for good? Cassandra warned people multiple times but they didn't believe her so they died. People today like ABBA respect her but what if they did that back then?