For me, Secure General Purpose computation is one of the most important problems, but most people don't seem to even realize the scope/nature of the problem. You've got an entire industry focused on the wrong problems, and thus offering the wrong solutions.
The problem is one of a huge missing feature, the ability to spend a chunk of your compute resources (CPU time, files, etc) on a problem in a safe and secure manner.
Because of this, much effort is being put on "safe" languages, "safe" programming techniques, teaching users how to be "safe", and updating/patching everything, every day, on every device in the world.
At it isn't working. That approach can't work.
Thus, computing isn't something you can trust. You're left in a world of potential land mines everywhere, metaphorically. This then makes any play outside of the cleared zones (FAANG run sites) unsafe. So effectively, general purpose use of the internet is no-go to 99.9% of the public.
This gives the gatekeepers almost unchecked power to control discourse, and subvert Democracy.
It can be fixed, the solutions have been known since the 1970s. There's no general interest in this, nor even a perception that the problems can be solved. We've generally convinced ourselves that computers require the services/subscriptions from experts to "keep them safe"
Would you want a locksmith continuously updating your locks on your doors? Why put up with one on your computer?
If you mean “visionaries” selling self-serving snake oil solutions to what often prove to be non-problems or insolvable problems, there are rather fewer of these than workers directly implementing daily solutions. Thank goodness for that.
If the visionaries had many years of practical hands-on experience solving day-to-day problems before proposing their broader schemes, more would bear fruit and more visionaries could be funded. But few want to do that preparatory dirty work. And those that have that experience are more valuable to society as managers of the daily work and generally lose their enthusiasm for the endless posturing that goes with high-stakes political crapshoots masquerading as “solving important problems”.
Most of these are bloody expensive - carbon removal, cell therapy, medical devices, longevity, transportation and housing, education, etc, etc.
Government 2.0 is just well, really difficult.
Which of these are cheap? AI? Biohacking? Supporting creators?
The last one is fairly doable, but there's probably people tackling it, including the people who host the sites these creators are on. It's also arguably the least important one on there.
AI and biohacking have a huge skill barrier. But both of these are very well funded because of that moat. Most of us can do some AI wrapper, but the high funding means that it moves fast enough that most of these wrappers are being replaced by official OpenAI stuff.
So you're left with the problems that are too difficult and expensive to tackle. Some people, like Gates and Musk try to take them, but there's only so many such individuals. There's a lot to say about billionaires funding these projects, but I'll leave that to someone else.
More established researchers don't do research, they look for funding to fund their grad students. Some biomedical labs do have specific diseases as research targets, but research in a direction often stops when the grad student graduates and new grad students tend to favor new problems, not continuing work on someone elses problem. Research funding is controlled by the older, more established researchers and they mostly go with what they know, rather than trying wild new things, even if little progress is being made.
In the social sciences things like hunger, health, shelter are somewhat studied but most researchers find more money in studies of how to motivate more workers to higher productivity and similar corporate aims. Mostly it's only governments who fund studies on the important problems because there is no obvious money to be made from the results, even though the societal benefits would be huge. War eats a lot of government funding.
There are a lot of other reasons also, like the financial industry grabbing programmers and physicists who could be working on more important things instead of gaming markets. I suggest taking a look at the buildings in your town, the nicest, biggest, most expensive buildings are where the money is going. The oldest, most run down places are where it is not going.