Why might your own work disappear from the story in that moment? It can seem ordinary and expected, while a lucky coincidence is easy to name as the reason for the result. Feeling awkward about praise may also play a part. These are possible explanations for particular moments, not a universal rule. The audience’s response did not depend on you alone; your part was the preparation and the content of the presentation.
Research on attribution also describes the opposite tendency: people may explain success through their abilities and failure through external circumstances. The point here is not that we always underestimate our effort, but that this is one possible explanation for a specific moment.
In that situation, you do not have to argue with luck; you can add your own contribution to the story: “The audience responded, and my preparation helped me hold their attention.” That does not make the result entirely your achievement—it simply keeps the work you did from being erased.
The stars speak. The choice is yours.