When I was younger I really like the surrealistic idea for automatic writing... I still practice it, but I have some distance from it. Raymond Queneau has a very good thought on this occasion and I will share it with you

Another very erroneous belief is that now widespread is that there can be a sign of equality between inspiration, unconscious exploration and liberation; between randomness, automatism and freedom. This inspiration, which consists in the blind obedience of every impulse, is actually slavery. The classic who writes a tragedy, observing a number of well-known rules, is freer than the poet who writes everything that passes through his mind and is a slave to other rules, unknown to himself.