Well when you get to high school make sure to take a sociology course. You'll enjoy it and probably learn a few things. You can ask a trained professional what the use is, they can probably explain it better than I could. I don't have my notes anymore, no place to keep them.
...often with the goal of applying such knowledge to the pursuit of social welfare...
Seems like a reasonable goal.
Social research informs economists, politicians, educators, planners, lawmakers, administrators, developers, business magnates, managers, non-governmental organizations and non-profit organizations, social workers, the formulation of public policy, and people interested in resolving social issues in general.
I don't see how economists, politicians, educators, planners, lawmakers, administrators, developers, business magnates, managers, non-governmental organizations and non-profit organizations, social workers, the formation of public policy or people interested in resolving social issues in general will benefit from theories that don't make any predictions. I didn't say Sociology was a useless science, I said that this was a useless theory.