If you want to make a difference, should you work in marketing? The short answer: probably not. Although marketing may have positive effects through informing consumers, there’s also arguments that marketing is harmful, so it’s overall effect is unclear.
However, marketing is a valuable, transferable skill. So spending several years in marketing keeps your options open and could open up positions in high-impact organisations.
It’s also well paid, so worth considering for earning to give.
Overall, it’s worth considering as an early career option, especially if you’re stronger on verbal rather than quantitative skills, and don’t want to work in consulting (which is also highly paid and keeps your options open).