What a joke lol. Might as well have the fastest NFL players race against Olympic track stars. McGregor dabbles in boxing as part of a wide range of dozens of techniques he has to master for the UFC ring. He's 28, meaning he's spent around 1/15th (Really, really rough guess but fair enough) of his training time over his 10 year career working on boxing, and practicing those skills against others who work on boxing even less. He's had very little pure boxing practice.
Vs a 40 year old with 22 years of experience with purely boxing, who has practiced nothing but boxing, against nothing but the worlds best boxers, who has never been defeated in 49 matches vs those boxers. By the numbers, Mayweather has boxed around 200x more than McGregor over their lives, and McGregors experience is limited to training and really weak boxing opponents in the UFC ring.
Everyone hyping the fight keeps talking about the "punchers chance" McGregor has and its so disrespectful to Mayweather and the sport of boxing in general. He has no punchers chance, he has no hope of landing anything meaningful on history's best defensive fighter. McGregor will punch himself out of energy within 5 rounds and Mayweather will laugh his way to an easy decision.