It is a paintball field... and unfortunately paint can get slippery and be dangerous for players. Sand is a soft surface to land on.
Its fine that you arent "feeling it." But may i just remind you that it is just sand and not something really damaging. Granted that your gear gets dirty... But thats a simple fix? I personally enjoy maintaining my airsoft and paintball weapons.
When I started my guns and most of my gear was covered in sand and needed extensive cleaning. Overtime you just learn not to dump your gear all over the sand.
Its an operating environment and is not deadly... I assume you play airsoft for the "Milsim" aspect? and not just to collect guns to talk about with people?