Most of the effective altruists, especially those who work in AI safety, major in Computer science or math. However, do you think those effective altruists who work in AI safety, should spend time learning multiple basic (university introduction course level) physics, chemistry, biology, social sciences...? I think mastering computer science knowledge doesn't require learning natural science. However, some argue regardless what you major in, you should study the basis of every subjects, those will be helpful for you someday (Such as Brian Tomasik's article stands for this opinion: Education matters for effective altruism). Thus, we are different than normal people who only aims to earn money, we want to do altruistic things(which is usually quite unique), so our needs of knowledge may be different than others. Do you think EA people should be a generalist, spend time learning such as General Physics, General Chemistry, General Biology...? Or we don't have to spend any time on subjects that are irrelevant to the issues we work in?
I guess that depends on what their end goal is, but tbh learning new things outside your specialism is usually very useful because it expands knowledge of how things work. If the end goal is to make impact with technical AI research I'd say yes - particularly social sciences (which you mention in your post). A basic understanding of social sciences such as sociology, law, and economics are very useful for technical AI research because that research inevitably interacts with and relies upon human systems as well as technical systems. Additionally, technical AI work in industry requires interaction with a lot of those departments so it helps to deepen your ability to bridge and pitch ideas or concepts.
Some may well disagree, but that's the nature of opinions.