commonsense, I didn't actually say that Mary Magdalene (MM) didn't exist but that she might not have existed, and it would be very odd to come back as a phantom.
The problem is that MM occurs only in the gospels and we have no way of knowing how reliable they are. They were written years after the event, in the last third of the 1st century AD, by unknown people who weren't there and who had no previous material to work from; we can find no
accounts by any eye-witnesses nor anything written during Jesus' supposed times.
Because we don't know who the gospel writers were we have no idea whether they were truth-tellers or liars, historians or fantasists.
I personally wouldn't bet more than fourpence that the very minor character, MM, existed and am surprised that you can have spent 8 years studying her.
Have you found references to her by a recognised, named historian then?
(Sorry that this has suddenly got serious, folks, but 'commonsense' did ask!)