Does it matter? Max payouts would have been almost impossible to happen, if you put your money into dice targeting a max payout, you will always lose your money.
it makes different , I agree with you that dice owners always will have an edge and it's hard to hit big
but without having a big bankroll two lucky players may make the site broke if there was a big payout limit on something like X64000
in my opinion this is why most dice sites stick to X9900 with limited maximum profit