What are the duties of an artist?

There is a poem by Kenneth Patchen that I feel should answer your question well

The Artist's Duty

So it is the duty of the artist to discourage all traces of shame

To extend all boundaries

To fog them in right over the plate

To kill only what is ridiculous

To establish problem

To ignore solutions

To listen to no one

To omit nothing

To contradict everything

To generate the free brain

To bear no cross

To take part in no crucifixion

To tinkle a warning when mankind strays

To explode upon all parties

To wound deeper then the soldier

To heal this poor obstinate monkey once and for all

To verify the irrational

To exaggerate all things

To inhibit everyone

To lubricate each proportion

To experience only experience

To set a flame in the high air

To exclaim at the commonplace alone

To cause the unseen eyes to open

To admire only the absurd

To be concerned with every profession save his own

To raise a fortuitous stink on the boulevards of truth and beauty

To desire an electrifiable intercourse with a female alligator

To lift the flesh above the suffering

To forgive the beautiful its disconsolate deceit

To flash his vengeful badge at every abyss

To HAPPEN

it is the artists duty to be alive

To drag people into glittering occupations

To blush perperually in gaping innocence

To drift happily through the ruined race-intelligence

To burrow beneath the subconscious

To defend the unreal at all cost of his reason

To obey each outrageous impulse

To commit his company to all enchantments