Hi dear @peachyladiva.
Yes , it is true that we didn't understand the meaning of the proverbs when we were children but now when we have wisdom and understanding abilities and now we can understand the meaning of the proverbs.

Climbing tall palm trees isn’t in vain.
The meaning of this proverb is that the action has a purpose and the efforts will lead to the positive results. Wishing you success.
Regards
@jannat12