These are traditional textbook examples for layoffs, of the kind told to impressionable young aspiring economists. Sometimes they are true.

Often, the company actually still needs those skills for what it's doing, but it's a bean-counter move, to "appease investors". Knowing that this will put more pressure on remaining employees, and also knowing that they'll soon be hiring for the same roles.

This is another way it's not right. There's little sense of obligation to the employee.