I want to point out that what you quoted was in the part about market economies, not planned ones. Planned ones would be short and wouldn’t meet their quotas, throwing everything else out of kilter.
I’m reminded of something… I have a book on my Kindle that is basically a historical artifact and illustrates a lot of what we’re discussing here.
It’s a book of the approved sausage recipes from communist Poland. Apparently ALL sausage producers were required to produce sausage according to this list of approved recipes, which date back to just after WWII and are old-school, traditional sausage recipes. And as such, are great for present-day artisanal sausage makers and hobbyists as a sort of time-capsule as to how sausages were made traditionally.
But it points out another aspect of things- there was zero flexibility. Didn’t matter if you lived in Bialystok, Gdansk, Krakow, or Szczecin, if you were a sausage producer, you were using the recipes on this list. There was no allowance for rise in ingredient prices, shortages, abundance, or anything like that- if you were making a certain kind of kielbasa, you had very limited options about how you could make it. And AFAIK, you couldn’t just freestyle and come up with a new type if for some reason you had a lot of something, and less of something else.
The author (re-publisher?) has a foreword where he extols the virtues of this system- guaranteed quality, known recipes, and so forth, and decries the changes in modern day sausage due to cost-cutting actions. Which is valid, but at the same time, he omits the downsides to it - if there wasn’t enough of something under the communits system, everyone did without, rather than allowing the manufacturers to pivot.
Largely all the feedback loops you have in a market economy don’t function in a planned economy, and that’s the overriding problem. Retail sales and prices are just the most obvious ones. But all the rest of it contributes, and when those feedback loops aren’t in place, the expectation is that the central planning is replacing those. Which works fine if things are static, but when/where they’re not, you get under/over production, inefficient distribution, and so forth. All of which compounds over time to cause it to just not work very well.