"The primary symptoms are the results of decreased stimulation of the motor cortex by the basal ganglia, normally caused by the insufficient formation and action of dopamine, which is produced in the dopaminergic neurons of the brain." -Wikipedia

my grandfather has parkinson’s disease, but is really chill. would him smoking weed help his disease at all? because parkinsons is a disease that is caused by "insufficient formation and action" would smoking pot help him?

I am studying at the moment about Parkinson’s disease. One of the symptoms of the condition is that there is diminished movement, so why is one of the treatment for it is to block acetycholine release from striatal cholinergic neurons when this neurotransmitter has exhibitory propeties and Parkinson’s disease symptoms has diminished movement? Also what is the role of dopamine in this condition?