Hmmm - the topic of the thread changed a bit I think.
I see nothing wrong in launching/landing with your own kite in the air.
The risk is bigger, no doubt, and not "recommendable" for less experienced, agree.
But apart from that, no problem
If we are out in waves, going upwind on a lonely beach with no "anchor" points, we do this often if we want to either take a break, or maybe turn on a camera or GoPro or whatever.
This is usually with 5-6-7-8m2 kites though, and relatively easy even possible when slightly overpowered (which could be another reason to go ashore).
With bigger kites it is more risky/difficult, because of their sheer size when up on the side.
But usually you can self launch/land a big kite much safer and easier even on a lonely beach, so often no problem.