Boiling is not the same as the wet/dry process. It is like comparing cooking to digestion. The end results are not the same.
Walstad's method uses straight soil without any processing, because she does not use much light. She also ends up being restricted in the species she uses, but that really isn't a problem. Find a soil that doesn't have bark, sawdust, or massive amounts peat or sphagnum moss and you can start a low light tank using it straight from the bag. After about 4 to 6 months you can step up the light as the soil will have completed the process anaerobically. Depending on how much organic matter is in the soil and how many deeply rooted rosette plants you have, it may go faster or take longer.
Aquascape? I'm a crypt farmer.
It's a fine line between fishing and standing on the shore looking like an idiot.
That IS an aquascape, it's titled "The Vacant Lot".