While his comment was a bit off putting, there's a point about overuse of the system.
A child goes missing. That's unfortunate. Perhaps not as unfortunate as you might guess, it's often a custody dispute with lower risks than the alert would make you think, but still worth getting the word out.
But 150 miles away, on a nightstand where it's certain that I won't be recognizing the license plate in the alert, there's not much to expect that I'll be able to do anything helpful. Sometimes the alerts are pointless. One was something like "we are searching for a six year old girl", no vehicle description, not even a description of any person apart from the age and a gender.
On the weather side, if it even thinks of raining, I'm going to get likely a number of emergency alert sounds with flash flood watch. A very normal rain pattern that could flood certain places to be sure, but those places are used to assuming any rain means a flood, so it's not news to them. Whether it's a "gentle rain will cause normal flooding" or "a catastrophic hurricane is going to level the whole area", it's the same alert with same tone of urgency and a single off/on switch to say whether you get them or not.
It's hard to take them seriously when 90% of them are nothing and/or I'm useless to them, but they present themselves with the same level of critical urgency demanded no matter what.