I thought this paragraph within an article entitled When Free Software Isn’t (Practically) Superior was written in a particularly elegant and succinct way:

By emphasizing the power of collaborative development and “distributed peer review,” open source approaches seem to have very little to say about why one should use, or contribute to, the vast majority of free software projects. Because the purported benefits of collaboration cannot be realized when there is no collaboration, the vast majority of free development projects are at no technical advantage with respect to a proprietary competitor.

The point is that there’s no benefit to Open Source software if it’s technically inferior to proprietary software. With FLOSS (Free Libre Open Source Software), on the other hand, the fact that it respects and protects the user’s freedom is a reason in and of itself.