You can do the same when you make a normal tethered selflaunch
Eventhough yes, problem is kites and bars...
I got a few bars yes. But also 3.5 - 5 - 5 - 6 - 7 - 8 - 9 - 11 - 12 - 12 - 13 - 15 m2 kites.
Using 3 different line lengths depending on whether for waveboards or wavefoilboards or lightwind foilboards, it is not really possible actually...
And even if using one line length only, I should have 12 bars with lines
But if for some reason I choose to pack down and rig up at a spot close to expecting same wind (with better waves, better conditions, better company, whatever...) I pack down this way, so really fast to rerig and ride again.
I dont like to do a slidelaunch, as then I have no chance to make sure the lines arent cluttered up - wayyyy too risky eventhough even faster yes.
With the tethered launch I can be sure everything is fine, one just roll the bar out first and anchor it to the stake, pump the kite and set it up while checking.
The idea is fine though, and good to show one example of how to keep track of the lines - as it is necessary in order not to screw them up so they get twisted or inside out - can happen easily
Some find it too simple yes, but remember, many dont know how to with many things and there could be hints like using the pump leash which is a great idea, so tutorials can always help some