Well, the reversing hoe takes damage as the opposite would be pretty OP. Sth like the Bedrock Hoe from RotaryCraft does not brake in the Farming Station.
As a workaround, try do autocraft (e.g. RFTools Crafter, Applied Energistics) Wood Hoes, and use them as an alternative. Wood is very easy to automate, so now you have infinite hoes.