The cost of hauling enough dirt to a site is horrific, at best. Also, being an organic surface it needs to be 'rotated' or 'tilled', so as to prevent mold, fungus, or anything growing in it. All information is from other sources. Soaks up paint. Non-slip by nature.
Sand ruins goggles, barrels, and almost all equipment.
It grinds away at internals, and so on. It's hard to move through. It gets 'pushed' like dirt, but worse. Flat like cement, it won't be 'pushed' away. Offers a 'sandpaper' style of grip on the floor.