My other argument I would make against the 31-31-31 argument, is that it's such an exact, no room for adjustment ideology as well.
Like, make a list of your 32 best Dmen in the league, and then try to explain to me why the 31st guy is worth being called a #1(Even if he is classified as a low end #1), and why the 32nd guy on that list is only a #2(Even high end #2).
I dunno, for me I just dont think one could successfully provide an argument to rank them as such. Hence how I see the parabolic graphing and breaking them down into tiers where the Top 3-4%(Or roughly 10 guys for me) are legit #1s, then the next 10-15% are #2 Guys, and so on and so on further down the charts.