A critic may reject some miracle stories as legendary, and not others, with no inconsistency at all for the simple reason that even if one holds miracles to be possible, one need not hold legends to be impossible! There are other factors, literary and historiographical ones, that might lead a critic to conclude that even though miracles can happen, it does not appear that in this or that case they did.
Beyond Born Again: Toward Evangelical Maturity (ed. Wildside Press LLC, 2008) - ISBN: 9781434477484