Cynical but true in my experience coaching multiple F250s. More competitive companies will move to a model based on managing the flow of value, while legacy companies will be stuck with a model based on managing people. The two models are very different, with the first one often eliminating whole layers of management through automation. Companies think they can save management jobs by going to a matrixed model and flattening the org, but that's just an accommodation to save managers most of the time.
In Dell's case, I can only speculate, but they need to justify office space, and managers need to manage people, and most of leadership get promoted from middle management (or sales).
Worthless levity injection attack: my client supplied Dell windows machine still hiccups on cold boots sometimes (this ticket has been open for decades), while all my personal linux machines just keep chugging away. Find a company that is automating away management layers and uses linux.