It takes arrogance to say such things about other people you have no reason whatever to distrust. Not only are you calling these worthy people superstitious but you are calling them liars, since Peter and John both claim to have been eyewitnesses, and Luke claims that what he wrote was based on the testimony of eyewitnesses, and he wrote the most complete description of the birth of Christ. Their testimonies are consistent on all the important points and it all adds up to extraordinary evidence for extraordinary claims
I think that what most fair minded sceptics would say, is not that Peter and John are liars, but that they might well be.
We know that people lie - about religion as well as everything else - any number of disgraced evangelist preachers will bear testimony. So until there is worthwhile, corroborating evidence that their (reported and much translated) words are true, we see no reason to trust them (as distinct from having a reason to distrust them).
You have that trust - that faith - but in all honesty, you have no way of demonstrating to anyone that your faith is founded on the words of people speaking the truth.
Could there be any greater conceit, than for someone to believe that the universe has to be simple enough for them to be able to understand it ?