I think we can all agree it's highly unlikely that Father, Son, and Holy Spirit took turns blindfolding themselves to play a divine version of pin-the-tail-on-the-donkey when deciding where Jesus should be born.
But perhaps they chose Bethlehem for symbolic reasons.
A farming town
The book of Ruth gives us our first proper look at Bethlehem in the Bible. It's mentioned twelve times before this, but never with any detail about what the town was actually like. In Ruth, we're introduced to a farming town busy with the barley and wheat harvests. Both crops are planted in the autumn. Barley matures faster than wheat, so it's harvested in late spring. Wheat is then harvested during early summer.
So Ruth worked alongside the women in Boaz's fields and gathered grain with them until the end of the barley harvest. Then she continued working with them through the wheat harvest in early summer.
— Ruth 2:23 NLT