Most never kites ARE super stable indeed...
Depower ability is not that important, as if you are able to walk with a kite, the pull is quite low really when no speed.
For waveriding it is even more significant, as the kites all sit stable and has good depower (the nature of wavekites), besides the fact that smaller kites are used - so here even a dog stake in sand works most often (NOT very solid)
Sanding a tip is not possible in many spots (or you have to wear a sandbag with you), and IMO way more risky, compared - you will also get wear on the lower side of the tip from the ground (when rocks like this thread describes) when you shake the sand off.
Folding the tip like we did in the old days, is not good for the kite, and even more risky as it becomes a "spring" loaded bomb ready to go off by itself
Yes, you might also get slight wear on the tip, when using your car or a stake - but not the same amount nor risk IMO, that it rolls over or even turn wrong like when using sand
And to those joking with this post - yes when experienced we all know these things, but MANY even those having ridden for some years, did not know this - believe me it is odd but true, many do not know how to selflaunch nor land, not without nor with a stake
So good to show this option
But you are right, some older kite in the bigger sizes in particular, are not that stable standing on the side so a greater risk...