Facing a crisis, a person often finds profound comfort simply in knowing that their cry is heard. King David expresses absolute trust in the direct link between a prayer spoken in distress and God's response, holding a complete faith that a cry for help will not go unanswered.
The primary approach among commentators is that this appeal is not merely a request, but a firm declaration of confidence. A person calls out to God with the clear knowledge and certainty of receiving an answer. This absolute trust stems from the recognition that there is no other power in the world capable of bringing salvation. This stands in sharp contrast to those who worship idols, mistakenly turning to the stars and planets with the false illusion that these forces can save them [רד״ק, אבן עזרא]. Furthermore, this confidence rests on the understanding that it is simply God's nature and way to bring salvation during times of distress [מלבי״ם].
Calling out specifically during a time of trouble highlights the deep sincerity of the prayer. The appeal to God is not made casually or as a test of His power, but rather flows from genuine hardship and a whole heart [אבן עזרא, רד״ק]. There is also a powerful message of comfort embedded in this timing. Even if a person failed to pray before the crisis arrived and only cries out when the trouble is already upon them, God still answers their prayer [אלשיך].
On a more personal level, experiencing trouble as an isolated individual brings unique challenges. While a prayer offered by a community is always accepted, a single person might worry that their personal flaws and sins will prevent their prayer from being heard. Because of this fear, the individual seeks an immediate response to ease their anxiety. The connection to God remains deeply personal and direct: a person calls out to God on their own, and God answers them directly, without the need for any angel or intermediary [אלשיך].