The categories you are discussing are probably too broad to say "nobody is working on solving this.
Let's go through each of the areas you list
1. Housing - how about lowering the cost of building? https://all3dp.com/2/3d-printed-house-cost/ What will 3D printed housing do for building communities? Does it move laborers into finishing (less time framing and bricking) and increase their average wage?
2. Health - so many health start-ups, but you have to pick one thing. We work in sleep-tech, it affects so much of your life. But I used to work in telehealth, how about all the genomics, cancer...how on earth did health make your list? VCs are plowing money into health. If you're in the US, and you are complaining about your healthcare system, that's maybe a different issue. I'm not US based.
3. Inequality - I'm not a fan of this label as the issue, I think targeting quality of life is more valuable. If I have a great quality of life, should I care how much somebody else has? Can we look at improvements in cost and delivery of education as creating value here?
4. Unkindness - Well...look at all the mindfulness stuff that's out there? There have always been, and probably always will be assholes. I'm not sure what technologies role here is.
5. Bllsht jobs - Stop worrying about what everyone else is doing in their jobs, and focus on yourself. I ran a metaverse company from 2017 - you would probably call that a BS job, and I'll admit, I didn't meet a lot of people through that experience that made me feel we were having a big impact on the world. Now that I'm in healthtech with a very clear focus, I find I'm meeting amazing people who are also doing world changing things.
Rather than wondering "why is nobody doing anything to solve these problems", I suggest you pick a problem you are particularly passionate about and figure out what you can do to help. Once you're in those communities, you'll probably see just how much people are doing, and be inspired by the people that are doing it.
All of the above is not to say there aren't a TON of people who are wasting their lives building another dating app, or an app that measures your clothes for you, etc etc. But we have a huge population on the planet, don't worry about what they're doing. You do you.