Unpopular Opinion: Fire alarm manufacturers may care about safety, but they're really in the business to scare people.

Two different buildings can be exactly the same, but they may have two different fire alarm systems (for an easy example, consider two identical Walmart Supercenters). One of the systems may be much louder than the other, but both systems are deemed loud enough so that everyone will hear it no matter what is going on in the building. Therefore, I can only conclude that the manufacturer of the louder fire alarm prides itself in their systems being louder than necessary, and I my guess is that their main goal is to see how many children they can make cry and how many people they can instill a lifelong fear in at a young age. And they can disguise their evil intents by the fact that their products save lives.