The difference is that artistic sensibility is largely subjective. This means that:
1. It's hard to measure (and people can disagree about it)
2. It can't really be improved using RL without a human in the loop (which is how math is being trained)
At a certain level, yes, but AI is still so bad at writing that its failures are objective and easily measurable
At a certain level, yes, but AI is still so bad at writing that its failures are objective and easily measurable