> because the tech industry is at a whole is out of creative ideas
This isn't true. However the tech industry is out ideas that apply to many many people and scale well.
Most people need a word processor at some point in their life (if your school doesn't make you write at least one paper on a word processor then your education failed - you might never do it again in your life but it is still an important skill), but those were already powerful enough in the 1980s, and the 1990s solved most of the usability issues.
Robotic vacuums can get some more innovation, but the obvious next steps are unsolved problems (I want it to pick up before it cleans) that may not be solvable for a reasonable price.
There are however a ton of niches that could use more technology. However because they are niches they don't scale. You can make millions (gross profit) if you can solve their problems, but not tens of millions - this is enough to get your personally a nice lifestyle if you run or work for such a company (think a 3-5 person company), but even if you could interest an investor there isn't enough for them to skim off any profit and still make money.
Not all niches that need tech are that small. There are a few large ones, but they are hard to find (if they were easy someone would have done it already). There are also a lot of what looks like large ones that either are not large, or are not large enough to pay for the investment needed. There are also some medium sized places that tech can help. Once in a while there are even tiny places where someone can make a difference (but generally this means you do the thing as your business and tech as a hobby after work)