Must have been a huge personal blow for him, I'm sorry for all the people who hoped for this tour to happen.
I don't want to be too cynical and this is not on Ozzy of course but on promoters worlwide, but when he thanks fans for patiently hold on to the tickets... well, what choices did they have anyway? get a refund because "I'm tired of waiting"? it's not that you can send the tickets back, once you purchased them, either the show gets officially cancelled, or you're stuck with them. Of course many will have sold them secondhand, but still, that's something that happens between concert goers, it does not go back to the original ticket sale, so waiting for the tour to happen was the only option for people who purchased tickets (aside from selling them secondhand) regardless if they had the patience for it or not.
This applies to every concert, of course, not just Ozzy. As for him, I hope he will get well soon and maybe he will play some concerts here and there when he's comfortable. Never been a fan but this doesn't mean I'm not sympathetic towards one of the defining figures of the genre we all love!