yet you're able to afford Islam the inherent capacity to decide what fair

The only reason (assuming you understand the application/context of those punishments) I claim those ethics/practices/jurisprudence are "right" is due to knowing the Holy Qur'an's divine origin. To cut off a theif's hand , elimination of usury banking, etc are radical. but the rituals don't prove or disprove the truth of the Qur'an.

Without holding to any kind of authority "right" leads to moral relativism. Just a few decades ago in the DSM homosexuality was a disease but now it's perfectly acceptable. Just last decade marajuana was illegal but now legal in some states. Without any kind of authority there are "absolutes rights". Nothing prevents me from living one moment as a Machavellian-Dog eat Dog mentality (except my inability to avoid being caught) or live as a altruist. essentially an individual's ethics are dictated by own operating principle always do something that either yields happiness or free-Guilty conscience

if I'm going to have to waste time on your "jinn" fetish?

As I said before if I didn't know for 100% facts Jinns, sihr, evil eye existed I wouldn't waste anyone's time and make myself look like a mental case. Only time really separates you from coming to realize what I say is true that and limitations on what wavelengths your rods and cones perceive.

How about you summarise Patricia Crone's Problems in sura 53;

You can study every orientalist but you'll come to realize it's really hinging on revisionism or some interpretation scheme.

If anyone can demonstrate the Qur'an hasn't been preserved than I would leave islam but I'd still believe an unseen realm existed