But the brightside is that talented people will find a way to "upskill" themselves in whatever environment they find themselves in. It is then up to the candidates to sell themselves and for the potential employers to be flexible about considering different backgrounds and nurturing the development of cross-functional skills that are needed for so-called data-engineers.
The skills listed in the article are all fairly common but its hard to find enough of these skills within individuals. For example, its not hard to find folks who can do the care and feeding of sql-server databases, or skilled programmers, or analysts who understand the business domain intimately. The problem is getting all of these together in one individual in a "know-enough-to-be-dangerous" level.