You also ignore the fact that MJ had lupus, not uncommon for vitiligo patients to have that comobid autoimmune disease as well. Did MJ gave that to him too?

Autoimmune Diseases Common in Patients with Vitiligo

https://www.the-rheumatologist.org/article/autoimmune-diseases-common-in-patients-with-vitiligo/

Other autoimmune diseases with significantly increased prevalence (compared with the general population) included discoid lupus, Guillain-Barre syndrome, linear morphea, myasthenia gravis, pernicious anemia, Sjogren syndrome and systemic lupus erythematosus (SLE).

Patients with at least one comorbid autoimmune disease tended to have more extensive vitiligo, compared with those who had no comorbid autoimmune disease.