The Razor Spikes of Self-Doubt.

It's best not to question whether what you are doing is worth it, especially when you wonder if other people care about it.
But it is perhaps the driving question, the annoying kid in the back seat that asks, "are we there yet?" When the journey has just begun. That bit of self doubt that is the drop of poison in the wine.
So, do other people care what you do?
Short answer; no.
The long answer: They don't care what you do until you have done it. Even then most people are so wrapped up in their own affairs to care. Sometimes, depending on your relation to the person, they are so wrapped up in if you care or not to notice what you do. At least, that is the way it seems to go.
So no, people don't care right now. But that begs another question: WILL they care once it is done? There is no simple answer, because that is the nature of people; rogue variables in an evolving equation. The equation doesn't mean anything, until it is calculated in the moment and the result is apparent.
Such thoughts and worries, if left to their own wills, their own ideas, will prevent the greatest art, stop the most important journeys, and crush the most beautiful souls into dust. And no one will care about the loss of great art, or great knowledge, if they care at all. They will only care the price they have to pay.
At least, that is my assumption, based on a few scattered unscientific observations.
Alas, it is time to return you to your volatile dreaming world. Remember this: Be amazing, when the world tells you it doesn't matter. Be big, when the world thinks you are small. Be unpredictable, when a trap is laid for you. Most important of all: Imagine.