The numbers make sense except for that pesky inflation. The 30% price correction up front is balanced out with another 10%+ or more correction in the way of inflation. The net result is the same either way.
That’s the problem with the Soft Landing. They aren’t making any distinction between PRICES and VALUE. If prices remain flat for 10 years the value of those prices have still declined just as much as if there had been a correction because of the effects of inflation on the dollars that comprise the price.