I have been hearing about it being dying and on the way out since the 1980s. This time may be different and it may not be a wolf cry as it turned out to be each time in the past.
If it really is in deep trouble, that card has been played so often that I'm jaded hearing it yet again. Maybe I shouldn't be but you see the downside of playing this card repeatedly as hyperbole.
The point is that it may well be under grave threat your entire life and still exist when you die. That doesn't mean it isn't under grave threat. There have been northern white rhinos in existence my entire life. There still are presently: 2 -- both female. Last chance to see...
There have occasionally be natural predators too, like the Crown of Thorn starfish.
The current threat to the reef is ocean warming -- a vastly different threat. There is not much humans can do in the short term to mitigate the problem.