What someone says in an interview and how he really feels might be two different things. If he feels more comfortable it might be enough for him to say so. That being said: it is hardly his fault that his voice isn't what it used to be
i dont know any band that has fans focused on the singer's voice that much. There are more factors leading to a good concert. I rather have somebody not torturing himself and sounding bad than having somebody being uncomfortable and hitting difficult notes. Jon is not on stage to please me, As long as they are putting in some effort, I am good!