We can't have a perfect distribution. I guess the closest to being good is bitcoin distribution. But if are talking about altcoins created some years after that
I see huge disproportions and backscene shady movement all the time. Distribution of a coin is not a feature it is a upshot of coin being good or bad.
Do you have any proof that "we can't" ?
It's convenient statement for early adopters, but is it true statement ? I doubt.
Prove it.
People give failing examples of distribution all the time (BTC, NEM, NXT, BTSX, AUR), but each one of them did not do the right thing, so those examples don't prove anything. There are millions of ways to fail, but we need one to succeed.
As for bitcoin distribution, even if it's currently the best (which I doubt), it's still not good enough and, unlike NXT, it cannot even get better due to weak algo. From my perspective bitcoin is dead and those merchants who bet on it investing into software that accepts bitcoin payments are fools. BTC rate may still fly for some time, but I would never keep my capital in it or do any development for it. I use it solely for quick conversion from fiat to NXT and ICOs.
Yes I have proof: Human nature. We aren't the same, some people is more skilled than other, smarter, clever, stronger, whatever, and profit from it. The early adopters in Bitcoin where smarter, more aware, visionaries that took the risk of getting involved into something worthless at the time. It is natural that they are compensated with more coins, simple as that.