Thats true Ug... but we have determined that those limits are not good enough.

I may play moves in all my games almost every day. even several times a day most of the time. But that does not mean that I can play 1 day games all the time. Playing 5 moves in one game does not give me the luxury of waiting 5 days for the next move. I can play 100 moves in the same game in one day, but would still only have 24 hours to make the next one, and that is not always possible.

Even the fastest players on this site can not be expected to move evry single day or even every 3 days all the time. It is not feesable. The only other solution is to play longer time limits with other fast players, hence the need for a speed rating, or play longer time limits, and take the chance that your game may last several months if you happen to find an opponent who moves only at the last minute.