This!
Data structures obviously do matter for software engineering.
But memorizing the solutions to a handful of random, difficult, data structure problems isn't very useful for a real job and shouldn't be part of the hiring process.
As you pointed out there has been high demand for toilets even during recent years, and yet unemployment is a thing that still exists in the world.
Where are all the toilet-manufacturing and toilet-installing jobs? We certainly have the technology to produce billions of toilets if we as a society decided to. We know there are billions of humans who need toilets, why isn't this demand creating jobs? Where are the toilets?
A big part of the answer to that question is that the billions of people who need toilets can't afford them, because they don't have jobs that would enable them to pay for toilets.
Toilets are so easy to manufacture at our technological level that toilet factories don't require many workers. Certainly not billions of workers, but we have billions of humans who need toilets.
Maybe the same problem affects all products. Will technology advance until 10000 or 10 or zero human workers will be required to run all the factories in the entire world for every imaginable product? Where then will billions of unemployed humans get money to buy the products from those factories?