Even doing a routine thing such as taxying in LOS is difficult. You have to not only avoid parked aircraft but wandering civilians who have no right to be anywhere near airside (so much for security). Then if all of that isn't too much to bear there are the cargo aircraft coming from that part of the terminal.
I have seen the way that the a/c are parked there and sometimes it defies belief. On my last trip a month back I was with Aero Contractors on their DHC8 and we were happily taxying towards the runway and we had to pick our way along the taxyway to avoid a parked 727.
Perhaps its cheaper for an a/c to be parked on a taxyway than on the apron??