Step-by-step explanation:
The statement highlights the fact an activity we may consider ourselves good at may not necessarily strengthen us mentally.
Hence, it emphasizes the need for self-evaluation of the needs we are good at to see whether actually makes us happy.
For example, someone who is good at telling nice stories and yet discovers when they are involved in that activity they aren't happy.
This scenario rightly dipicts why one's strength is not determined by what they are good.
Therefore, we can say indeed, "Just because you're good at something doesn't make it a strength!!".