Pliny the In Between has illustrated what most mythicists seem unable to grasp. Accepting the existence of a historical Jesus is not about accepting a miracle working human, much less a deity.
But in another sense, mythicism is much worse than mainstream historical criticism for those whose aim is to disprove the existence of deities. Historical study shows that, in our earliest Gospels, Jesus is a human figure and not a deity. But if one rejects that result of historical study, what is one left with? Disproving the existence of purely spiritual entities is notoriously difficult, if not indeed inherently impossible.