Engineering is applied science. The questions that should concern engineers are - How do you reach the benefit of science to more people? How do you make things more accessible and affordable? How do we use technology to do more things that are beneficial to people?
Marketing is applied engineering. The questions that should concern them are - How can we get this stuff that we’ve engineered into the hands of more people? Are the desired benefits being realized by those who are using it? How can we make it better?