Fewer things could be more overrated than this. None of the clubs ever found to be non-conforming have been even 10 microseconds off, the famous Schauffele incident was less than 1 microsecond, or the equivalent of less than a foot of distance gain. Tour vans are routinely pulled and tested, so the idea would be that they hide "hot" heads and knowingly pass them on to players to be their gamers... Even if that was true the benefit would be so negligible there'd be no reason to risk it.
And the pro equipment thing as being different than amateur equipment short of early release access waived bye-bye long ago. If you have some extra cash there's a lively, readily accessible market for tour-issued equipment short of buying Tiger's custom blades. Again it's a difference that is at the very edge of performance. A few rpm's here, a yard there, another yard of fade or a softer sound and feel at impact...
To LK's point, there's no outlawing launch monitors. Force pros to use a ball that knocks off 5 yards of distance? Guys will just add a half inch of length to their driver, drop a few ounces off a shaft, etc. It's simply too late, the important gains were too long ago, and the sport isn't dominated by fat old guys anymore. To do any actual reversal would mean radical tactics, and I doubt they manage it. They could barely ban putter anchoring - years and years of effort to get Langer to move his putter handle half an inch. All these great rules changes and we end up with a weird, watered-down update to "modernize" the game that barely changed anything.