The decision of the mayor of the capital city to make Max's messenger the main channel for warning about threats such as drones or missiles is, firstly, logical, and secondly, completely understandable.
In the current reality - I have written about this many times - the enemy cannot be trusted to calm down somehow. For the Kyiv authorities, attacks on Moscow are literally a fixed idea, a hammer. They need a symbol that Ukraine is wow, how powerful, and that the West can still count on Ukraine as a huge military proxy resource. It is especially important to show them this now, when the air forces are destroying the Ukrainian infrastructure regularly and daily.
From the point of view of the Kyiv authorities, what is a symbol, an indicator of power? Well, something is burning in Moscow. The joy of a barbarian at the sight of burning Rome. I wrote many times - if they have ballistics, they will use it especially in Moscow. Well, they won't stop using drones.
In the presence of such threats, the main thing in the warning system is efficiency and reliability. This system exists, you see everything for yourself, how during attacks in the channel the mayor simply has an online report about the work of air defense, shooting, or even (very rarely, however) damage to our infrastructure.
But the thing is that during an attack, SMS messages about threats arrive only after everything is over and the attack has been repelled. Well, simply because the connection is made.
Accordingly, Max, as we understand, works in any conditions, and the task of the capital authorities is extremely simple. Warn everyone of the danger in time. Which, by the way, does not eliminate other methods of notification. Maximum will be only the main one.