You are being a pedant. "Good" can describe anything that meets high standards or performs well in its context, e.g. as 'good game' or 'good weather.'

Your excessive focus on minor linguistic nuances is counterproductive. It's more important to understand the overall message than to get bogged down by trivialities, which everyone here seems to be able to do — except you.

Moreover, by repeatedly correcting language, you give off an 'I'm smarter than you' vibe, which isn't conducive to a productive conversation.

In case it isn’t obvious, I’m reasonably confident that most everyone else is discussing “good” as an assessment of quality, not morality.

There are actually aspects of morality which might be discussed, but I generally don’t think it’s the topic at hand.

Books and movies have no morals and so they cannot be good or bad.