He was granted a divorce because his wife refused sex. The "jinn" thing-that she has mental illness is also actually grounds to void a marriage in this country and many others. Among JWs from a post I read a few months ago, refusing a husband sex is not grounds for a 'scriptural' divorce.
That this made the news is only because the woman's excuse was brought up in court. There was never a marriage.
In such a situation, traditionally, the man would get back his marriage gift (in full or part, depending on circumstances) and they would simply part with not recriminations or big public to-do.
The man did not insist on or 'take'his marital rights. He respected her wishes. Except for giving her alimony:)