Based on a few individual experiences, concern about climate change vs (perceived/actual) lack of concern in EA seems like a division that might be a sticking point for potential EAs.
Possible cruxes:
- EA's current material isn't convincing to people who see Global warming as a top priority.
- This is a sticking point for (some) people who might otherwise join EA.
- There are many such people.
It's not super clear to me either way but I'm curious what people think.
While I agree in general, the problem is “something shorter, with more direct comparisons to other cause areas” might have the opposite effect. That is the kind of argument that could induce emotional rejection on people that have already spent significant resources (or have modeled their identities) on fighting climate change. For that specific group of people, you probably need something with significantly more nuance.