Conversely, hyper focusing on the top two can also be a distraction. There isn't a single pool of resources and labor that is being managed by a single entity.

Conversely, hyper focusing on the top two can also be a distraction. There isn't a single pool of resources and labor that is being managed by a single entity. The people spreading rocks on fields are not the same people building solar panels or producing electric vehicles. Reducing funding spent on carbon capture does not inherently increase the funding for renewables. Researching cleaner concrete manufacturing does not inherently decelerate coal plant phase out. While reducing CO2 emmissions from the two biggest sources would be a huge win, people have been trying to achieve that for decades, and even in the most optimistic scenario it's a battle that will continue for another few decades. In the meantime there is a lot of other stuff that can be worked on in parallel. Waiting around for a silver bullet to solve everything is a great way to get nothing done, and so those who want nothing to get done point out the limitations of various proposals without putting forward options that put those specific resources to better use. Further, when you tell people that everything is insignificant compared to this one great challenge, and that challenge is something that people don't see much rapid progress on, it leads to defeatism - why should I buy an energy efficient heat pump when people on the other side of the world are currently building hundreds of coal plants? Again this is taken advantage of by malicious actors who turn that defeatism into resentment of even trying to make things better.