While I sort of agree that players being exhausted is their own problem, I think we also have to be realistic for a minute here, great returners on tour are far and few.
There's a lot more players that are as skilled at returning as the Raonic, Isner, Kyrgios of this world compared to tier returners like Djokovic, Murray, Agassi and that's fine, every player has their own strength/weaknesses.
I see that decision as a way of "containing" matches should the worst case scenario happens. From a logistic standpoint, this makes a lot of sense to me. They waited a bit too long on this one IMO, should've been made after the Isner/Mahut non-sense from a few years ago.