No. She's already documented as one of the all time best vocalists with one of the biggest careers in recorded music history; her career at this point is based on that and the fan base she built in her prime, she doesn't have anything else to prove. It's not like she's on album 1/2/3 and still building a name.
The worst thing that will come of this and the aftermath is that perhaps more people will be made aware of the current state of her voice which isn't a big deal. It's not uncommon for singers to have diminished abilities as they age for various reasons and of course it's embarrassing, but it will pass and her fans will still support her.