It's not needed for a professional designer / photographer etc but now a person who does not have those resources can create them
Why would you want to? These are advertising for a luxury goods company. You have to include the actual goods in the picture, not a hallucination, and you can afford to do it properly.
The killian and polo images are strange. There is a mirror over an sofa in a poor lit room. I said strange, not impossible.
And any computer program can be written in assembly, so why have other programming languages?
This is comparing apples to oranges.
My point is that "X isn't necessary to create Y" is not a useful critique of X or Y, or of the process of creating Y using X