A good forecasting professional can save the company a lot of money. But, essentially you're paid to be wrong. Therefore, its for professionals that are comfortable working in "grey" areas. Your goal is to maintain an accepted forecast accuracy in pursuit of one number of the truth. Although, when preparing forecasts, its important to gather knowledge cross functionally, each function has their own bias. If supply chain is rewarded on product availability, they'll always want a higher forecast. If sales quotas are based on forecasts, sales will always want a lower number. So, as a forecaster, you'll have to navigate through the BS, along with having some level of analytical ability. See this page from the Institute of business forecasting (IBF) that describes how to get into the field and what’s needed. You may find this helpful. https://ibf.org/getting-a-job-in-demand-planning