Hun, I think you are being needlessly argumentative, here.
The "pooping bit" is still relevant, in the sense that we are still not to poop where we eat...we are still to dispose of our poop and not have it near our homes. We've advanced a bit since those ancient times, but poop is still a dangerous substance, as it has some rather nasty little bugs living in it (something those early people could not have known). Someone living in a Manhattan apartment could hardly be expected to carry a spade to some private place outside the camp, or in this case, the city...dig a hole, do his business and then turn back and bury it. However, he is expected to use the toilet in his apartment, flush it when he's through, wipe his little bottom, and wash his hands thoroughly.
So, while the method described in Leviticus might be outdated, the need for cleanliness remains, and the command to properly dispose of one's poop is still valid.
I hope I really didn't need to explain that to you...