Remember that DC isn't only useful for the clearly defined direct goals (e.g. in F@H's case, to find cures for diseases) but also indirectly, to help us understand how to use resources more effectively. A lot of units were folded purely to improve algorithms so that future work could be done more efficiently, I'd imagine this progress is applicable to other areas too.
As above, a lot of research papers have used work done by the F@H project, I did also read about an Alzheimer's drug developed using results from F@H that was due to market fairly soon. Also, remember that work on new drugs does take a long time so the work being done right now by F@H may not come to fruition in terms of actual usable drugs for 5-10 years or more.