I think this is often a real tradeoff, but there are other ways of framing it that might help:
A) You should work in something you at least somewhat enjoy and have a good personal fit for in order to avoid burnout (I think this is 80k's position as well). Within the range of things that meet this criteria, some will be more impactful than others, and you should choose the most impactful one. EA frameworks are very useful for discerning which one this might be.
B) The aptitude-building approach (from Holden Karnofsky's 80k podcast episode): You should become great at something you like and are very good at, and then wield it in the most impactful way you can, which knowledge of EA is again useful for. (Even if it is not initially obvious how, most skills can be applied to EA in some way—for example, creative writing like HPMOR has served as a great tool for community building.)
If someone is unwilling to move away from a low-impact cause, there are still ways EA can be useful for helping them be more impactful within their cause. Similarly, if someone is set on a certain skill, EA can help them use it to do good effectively.
Hi Misha. Thanks for your answer. I was wondering why you believe top EA cause areas to not be capable of utilizing people with a wide range of backgrounds and preferences. It seems to me like many of the top causes require various backgrounds. For example, reducing existential risk seems to require people in academia doing research, in policy enacting insights, in the media raising concerns, in tech building solutions, etc.
So let's be more specific, current existential risk reduction focuses primarily on AI risk and biosecurity. Contributing to these fields requires quite a bit of specialization and high levels of interest in AI or biotechnology — this is the first filter. Let's look at hypothetical positions DeepMind can hire for: they can absorb a lot of research scientists, some policy/strategy specialists, and a few general writers/communication specialists. DM probably doesn't hire much if any people majoring in business and management, nursing, educations, criminal justice, anthropology, history, kinesiology, and arts — and these are all very popular undergraduate majors. There is a limited number of organizations, these organizations have their peculiarities and cultural issues — this is another filter.
Seconding Khorton's reply, as a community builder you deal with individuals, who you can help select the path of most impact. It might be in an EA cause area or it might be not. The aforementioned filters might be prohibitive to some or might not pose a problem to others. Everyday longtermism is likely the option available to most. But in any case, you deal with individuals and individuals are peculiar :)