Why won't anyone ask it ?

Hah yeah I've lost count how many Luca has been to.

They won't allow it. Simple as that. They have strict and ridiculous rules. You can't just ask anything you want and I bet if you dare to do so, you are banned for life.
The one I attended didn't have a Q&A or I SWEAR I would have asked (I have no intention to go to one of those events EVER again anyway)

Well let's have a whip round, buy me a plane ticket and I'll go and knock on his front door and ask him.

I remember an interview in the UK (maybe 2010) when someone (maybe phillip schofield) commented on jon still being able to hit the high notes of livin on a prayer. I remember the band going silent and jon looking very sheepish.

Oh if you do remember I would LOVE to see a video of that!
Beyond that I don't think it's something that's been addressed publicly by Jon. There was those comments in 2013 where Jon said jokingly that those high notes in prayer are a bitch, and that he would try anything if it meant he would sing good every night. But as far as loosing his voice and loosing a fair amount of his range I'm not aware of any comments on the matter. He should though, it's very obvious and he's only human, I'm betting a lot of people would be able to understand....

Most of the questions asked there are boring but what do you expect him to say when someone asked him about his voice being shot?
The only thing I can imagine is something like 'How do you deal with vocal changes and how do you keep your voice in shape?'
But I don't think most of the people at these events don't even notice the changes.
I don't think you get banned for asking these questions as long as it is respectful anyway.

I don't remember that but I do remember him mentioning about the cost of ticket prices and Jon done the whole 'Ours? Here? Are they?' and then claimed he didn't have an idea how much they were.

Wish people pulled up Jon on more things. Be good to see what he has to say when someone asks different questions than the usual.

Schofield asking Jon about the ticket prices was about as hard hitting an interview as Jon has faced which says it all.

That was hilarious. Even Schofield got jittery asking it.

Threads like this piss me off to be honest.

I think 90% of people if they met Jon wouldn't dare ask such a question and would tread the line of 'thanks, changed my life, mean so much to me' etc. as someone pointed out previously.

So why rag on people who pay money to go to these events? They can ask whatever they like.

And for the record, Jon is not the only one who says the same things all the time during interviews.

Ever tried anger management ?