I don't think building an AI is the most important task on our plate. We still have those disease, hunger, poverty, and war problems to contend with. If building an AI helps us solve those, then sure, let's build the AI. But I don't think strong AI is necessary to gain traction on the problems that confront the sapient beings we already have around.
It's never a good idea to tell other people what they should be putting their efforts into. There's isn't just one valid task for everyone to focus on; if you aren't interested in the AI problem it doesn't mean others aren't, and solving any problem that needs solved is a valid thing to do regardless of where on the priority list you might think the problem lies.