Being seen is a form of policing.
There is a persistent belief that the serious part of police work happens out of sight — in investigation rooms, in intelligence, in the file. Much of it does. But the part that determines whether a district will cooperate with any of that is conducted entirely in the open, and is frequently treated as an interruption to the real job.
Appearing at a school, a felicitation, a fishermen's association meeting or a local function is not public relations. It is the construction of a specific, practical asset: a population that has met the police in a context where nothing was at stake, and therefore has some basis for calling them when something is. That asset cannot be built during a crisis. It can only be spent then.
The corollary matters too. Visibility that is purely ceremonial — appearance without availability — is quickly identified as such and does more harm than absence. Being seen is only useful if being reached is also possible.