Science Research doesn't happen for its own sake. Every effort needs to be a part of the pipeline of demand and supply. Otherwise it's just a tune that you sing in the shower.
But, more importantly, who dictates what needs to happen. If you so desire, you should absolutely sing a tune in the shower, write a poem for yourself, calculate an effect and throw the piece of paper away, write code and delete it. The satisfaction is in exercising your creative urges, learning a new skill, exploring your curiosity even if no one else sees it or uses it.
I have had the privilege of working with some of the best physicists on the planet. Every single one of them has exposed only part of their work to the world. The rest might not be remarkable in terms of novelty but was crucial to them. They had to do it irrespective of "impact" or "importance". The dead-ends weren't dead to them.
Philosophically, as far as I know, we all get one shot at living. If I can help it, I am going to only spend a fraction of my time choosing to be "part of the pipeline of demand and supply". The rest will be wanderings.