The US would not usually blow up a narco sub it deals with the ecological effects on the bio ecosystem in the water.
Imagine if it was fentanyl which maybe some cover for making things out to be worse then what they are in the news now or some thing lol. Still having that much of anything in the water is not a good idea.
It just shows lack of experience in this way… immature and obviously stupidity.
Only under extreme cases would they opt to blow up a boat when they can simply make it like no longer operate.