Slightly tangential, but why is the major so important in the US for hiring? If I want to join some generic grad scheme (e.g. Proctor and Gamble, an accountancy

Slightly tangential, but why is the major so important in the US for hiring? If I want to join some generic grad scheme (e.g. Proctor and Gamble, an accountancy firm) do I need to have done a business or economics major? In the UK the requirement for a graduate role is usually just any degree unless you’re applying for something specific. Possibly this is because UK degrees are more specialised. I also suspect that for most graduate business jobs your academic knowledge isn’t very important. It just strikes me as a better way of allowing people to study what they want rather than requiring an endless stream of drones.