Hi hueyracer,
its one thing to bring the forces in - if needed, they even jump out from a low hover or just one wheel light on the ground.
It´s another story to park it so, that you can shut it down.
One molehole can ruin your day - and I might recal the accident - I think somewhere in south east asia, where the pilot let a passenger disembark at a footballfield and sunk in with one gear - lifted off thereafter and at the end fell out of the sky!
And if you have someone, who has a look while putting weight on the wheels on an unknown ground, thats much better than needing a trailer to get the helicopter back home!
If you have natural grown ground to land on thats quite a difference to mostly farmland, which is processed on a regular basis - often down to 1/2 a meter!
Add a little rain, which is here quite commen and you´ll understand, why we prefer skids instead of wheels.