I can see both sides of it. Playing to a click makes the performance more consistent, tempo-wise, and allows them to add all those subtle textures with lights, backing tracks, and video, and that can make for a better experience for some. On the other hand, even if the shows are relatively the same, the smallest changes in tempo to react to the crowd energy or whatever, can make the shows feel like they have more energy, which can make for a better experience.
To me, I'm not really on one side or the other. I see the benefits of both, and can enjoy both approaches.