If mountains could be moved by Faith then why do we have bulldozers and backhoes?
Lack of 'faith' or, if you prefer, true understanding of all natural laws. Our ancestors had far more power 'in the flesh' than now. Research Puma Punku in Peru or Coral Castles in Florida. No bulldozers required.
Inventing them gave atheists something to do while waiting for theists to move those mountains by faith.
If a mountain moved, could then you definitely have faith? the classic Israelites seen many miracles achieved by utilising God beforehand of their launch from Egypt and after their launch. The parting of the crimson sea became a efficient teach of the could of God. yet, whilst Moses went up into the mountain of God, maximum the the Israelites fell back into sin. So, how long could you suspect if a mountain became moved?
it took great faith to build these machines the ancients would have never believed the things we take for granted today
For the same reason most Christians would go to the doctor when they're sick--having faith is fine and dandy but in the end you need fact to get stuff done.