Does anyone actually care about the above issues?

If yes, and you’ve solved them, people should be very interested in using what you’ve built. If people are using what you’ve built and are willing to pay for it, VCs will be interested.

If you haven’t solved them, but can validate they are real problems people care about, and have a path towards solving them, this should make a compelling VC pitch.

If they are real engineering problems but no one seems to care much about them, then it’s just a hobby.