I think there is what could be tentatively called the Nietzsche phenomenon. Friedrich Nietzsche was a great philosopher. His philosophical writings are full of inspirations and poetic repercussions. His ideas about life are superb. I love his conceptualization of the apotheosis of dancing. I endorse his prediction that the future would be centered around comedy rather than tragedy, as exposited in Gay Science.
Towards the latter part of his life, his passion seemed to have shifted to music, partly inspired by Richard Wagner. However, Nietzsche's compositions were at best mediocre.
So how could someone who is a genius in one field be quite lagging in another, although he or she shows passion for that alternative activity? That is the Nietzsche phenomenon, or Nietzsche syndrome.
In general, perception and action are separate, so it is no mystery that one could perceive good music but is unable to produce one. Genius could be compartmentalized, so that one who excels in one field is quite awkward in another.
Having said that, perhaps it was Nietzsche's interest in music, together with the personality and mindset accompanying it, that made Nietzsche's philosophy great. His writings are musical after all.
Thus, the Nietzsche phenomenon might explain the makeup of some geniuses. Even if the output is poor, passionate interest in one field might improve the performance in another.