I think it’s the wrong argument.
You don’t need to get rid of world heritage to save the world, it would be throwing out the baby with the bath water.
What we need is politicians who a) actually understand science and b) care enough to push through environmental protection plans that will stop CO2 output and c) the biggest problem, voters that have a and b too.
What we got is loads of career opportunists that happily lie their ass off to become popular, happily dismantle any environmental protections to become popular and they’re voted for by stupid ignorant voters that happily lao up all the crap they’re being fed. World wide governments are making swings to the right, world wide, environmental protections aren’t increased, they’re dismantled.
Do you really believe that destroying art will change any of this for the better?