10/17 number includes those alongside, returning for maintenance or repair, preparing to sail or just about to undergo a knee-trembling feasibility assessment to see if they will ever sail again etc. If you called a snap operation and sortied the lot (once suitably bombed-up) you would find a somewhat lower number. The competition for resources, including crews that are trained, ready and equipped, let alone with fully-serviceable sensors and full weapons fit, would induce tears.
The USN sails like they are just about to start a war. Manpower and maintenance still hits them hard though and the surface fleet is currently considering a switch to a Blue/Gold 2-crew model. No doubt they will find that it is more efficient, to the point that they drain the supporting lines and end up with harder-working ships awaiting their turn at saturated maintenance facilities. But surely, more must be better, right?