That's a really strange piece of analysis. On another night Courteous doesn't have the performance of his life and Liverpool are already 2 or 3 up before Real score. Liverpool had 24 shots to Real's 4, 9 were on target to Real's 2. Real had 2 good chances, one was ruled out for offside and the other one was the goal. If Liverpool didn't push their fullbacks high the result would have been the same, that didn't contribute to the goal.
Surely no-one believed Liverpool just had to turn up to win it, Real managed to get through a really tough route to the final and have managed to grind out results against some of the best sides in the world. But Liverpool weren't outclassed, weren't outfought and weren't outthought, they just couldn't find a way past a world class keeper having the kind of game that you rarely see outside of FIFA or Football Manager. You can credit Liverpool and Klopp for that performance and equally believe that Real deserve a lot of credit for being able to grind out results in the way they have throughout the competition.