Why Littoral Combat Ship contracts continued despite criticism

If the US Navy dislikes LCS, why did it continue building and commissioning the ships?

The reasons offered are cancellation costs and the lack of a replacement far enough into production to fill the gap.

Existing contracts introduce a cost to cancelling ships already ordered. The other constraint raised is the absence of an alternative far enough into production to fill the immediate gap. The explanation therefore concerns the available construction schedule and contractual commitments, without supplying a comparison of individual ships' capabilities.