Question

Did the lack of observable parallax help convince astronomers Earth did not move?

Answer 1

No.

Explanation:

It was a lacking in knowledge of the mechanics of orbits. The idea of helio-centric solar system was first presented by Copernicus and then only on his death bed.

The idea of a geo-centric solar system was so ingrained in the ancients thought process that they went to great lengths to prove it true.