It's cheap and lazy to just use the H2H mythical when comparing fighters. I can understand in good fun doing it with fighters from different eras. Other than that I think it's a way for fans to prop up their favorites because they don't have the resume to back up their claims. It should be about who you beat, when you beat them, and how you beat them.
Interesting point you boys raise. Great example is Duran and Mayweather at lightweight. Duran is largely viewed as greatest lighweight of all time and of higher stature than Mayweather all time pound for pound. But there is also a lot of hard core heads that feel Mayweather could beat Duran at lightweight (i think he could, styles make fights, would probably bet Duran tho) and that should mean he is viewed as greater lighweight and all time.
both p4p and h2h are subjective mythical ratings. there's no truth behind any of them it's all opinions.
Never seen somebody say this. A better example of this is Golovkin. A guy who's best win is Daniel Geale, a guy who was just easily KOed in 4 rounds by a blown up JMW. Golovkin is solely ranked on the eye-test or H2H. Not that there is necessarily anything wrong with that.
Bingo! When you match fighters head to head, you are effectively god, and accountable to no form of testing. If you compare them based on resume, people can call bull5hit on you very quickly, if you make a pick that is unwarranted.
Why stop at resumes? They're overrated too. Let's just make up records. Change the rules so that when Floyd wins it goes to Excusequiao's record! Floyd is 0-0 right now :rofl