ME,
Your extract might use English words but the sense is hard to define if you haven't been following the story.
Looking at your link what you appear to have is a mission specific vessel.
would operate along crowded coastal waters, hiding in coves and springing out
Plenty of crowded coastal water ways but
coves? There are many coasts that do not have coves and are exposed to onshore weather. This was the preserve of coastal forces in WW2, forces such as PT boats, MTBs, MGBs etc. While some MGBs operated successfully in contested waters of the Adriatic and Aegean predominantly they need secure bases on friendly shores. This makes them largely a defensive asset as opposed to the combat reach of blue water vessels.
The Swedish Navy developed a stealth craft 15 years ago. It was barely visible from 2 miles away in good visibility and would have been ideal for their littoral operations.
A parallel would be the long range bomber or fighter/bomber - short range fighter battle. The former needs size and fuel load to reach the enemy and thus sacrifices speed and manoeuvreability, the latter is 'cheap' and agile. If we eschew the heavy metal then neither side would have the reach to engage each other. A carrier however does just that; it enables the delivery of agile airpower to meet an agile enemy.
Not sure though what attitude you are asking us to consider.