These scenarios have already been discussed back and forth on this thread already.
Your point was the following:
How do you know that CMs can be "effectively" engaged by "low-cost CIWS" and "short-range SAMs" ?
How many CMs have been intercepted by these solutions to date? How many got through? What's the ratio?
Naval ships face the exact same problem with regards to incoming subsonic cruise missiles.
Tomahawks and JASSMs have both land-attack and anti-ship variants.
We do see Gun CIWS systems, short-range SAMs and medium-range SAMs mounted on Frigates.
And there are enough public statements on the effectiveness of these air defences against both stealthy cruise missiles and non-stealthy cruise missiles.
My guess is that a medium-range SAM system (like the HQ-16 or ESSM) has a pk of 70-90% against a slow subsonic cruise missile. And if you can detect it at the radar horizon, you get at least 3 shots at the cruise missile.
For shorter-range SAMs, effectiveness should be even higher because of the shorter-range. The effectiveness of Gun CIWS is likely lower, but because the cost per engagement is so low, the Gun CIWS shots are essentially free.