I mean there's a big problem if we're admitting Rafa for example would have won almost no slams if he were enforced consistently by the rule. That would mean the only thing stopping a player from becoming an ATG is a few extra seconds rest. That's basically an admission that the ATP are hindering players from becoming 10x better. Just lol
OK, let's look at it from a different angle.
Top guys win approx. 52-54% of all points they play.
with 52% being approx. good enough to be top 10 and 54% - top 3/4
Just another evidence how slim the margins are in this game.
By failing to properly enforce the time between points rule, one could as well argue that some guys receive unfair edge over the rest, as if ATP + ITF would enforce the rule, the % of points won by Nadal, Djokovic, Murray and other players that rather benefit of rallies going past 20 shots would go down.
So, we could say that this failure resulted in these guys winning points, matches and tournaments that they wouldn't have won if the rule was consistently and equally applied to all.
This sounds a bit like the performance enhacers now, no? but it is widely accepted that getting an edge because of PED is not in line with the values promoted by sport and such athletes are disqualified.