It is an opinion and it has his arguments. I have just another. Vingegaard was close to doesnt start this Tour, he was one month on hospital. If some people think wrist issue of Pogacar was a problem, imagine Viggo injuries.
We will see a new Viggo after this rest day, it is normal when you didnt get optimal to a 3 weeks race to be stronger last week, he needed this rest day.
At the level Pogacar is showing I think there is nothing to do, but if the 19 stage would have another climb at the begining, an stage with at least 180 km, I will say the race will be now 50-50. Now I see 90-10. Next stage is even shorter, but it all up and down, it is the last and you never knows. By the way. when you com pred times of climbing, I just remeber now that Le Couillole, who they climb that day and it climbed at Mercan Tour classic, was climbed better by Froome 2 years ago than Pogacar later at le Tour. and there was bettel at the climb on le Tour by Pogacar. And of course Froome now is not climbing better than Pogacar. You can take some conclusion of those numbers itself, but not too much.