The strength of Irrelevance

We take so much effort to plant a seed in fertile soil; water it; manure it; and put it in the right environment. Yet, we are unable to guarantee its growth.

But, look at old buildings where in small crack in the masonry, a seed lands from the excrement of a bird, takes root and grows luxuriantly.

Is this is metaphor for thoughts and learning? Think about it. Relevant learning takes so much effort to develop and cultivate. Irrelevant learning like jokes, tunes and useless statistics just flow into our mind and take root and become ineffaceable.