I've found the author of Voynich manuscript. He was Giovanni Aurispa.

[Koen G]

Of course you will still get confident female "solvers" (we have seen them), and it's probably not possible to ascertain gender-based trends from the data, especially if there are intervening variables, but it would be interesting.

It's probably best to stop this discussion in public, tavie. No because it is not interesting, but because it can only lead to very unpleasant situations. If someone wanted to counter your argument, they would provide names of women who are being just as annoyingly overconfident as the male examples you mention. The next part of the discussion would be to see if there are actually more men displaying this behavior than women. This would require you to determine the total number of solvers first (there may just be more men overall, so also more difficult characters among them). This, in turn, would have you round up everyone who has submitted a theory, and then classify their behavior as "mansplaining" or "not mansplaining". (The use of the word "mansplaining" already introduces a certain bias in the way we'd observe people's behavior). 

In short, before you know it, you'd be organizing a public tribunal about dozens of people's behavior (people of all genders) and it would lead to great bitterness.

A more objective thing you could research, is to see which percentage of people who are convinced they have a solution will change their mind when confronted with massive evidence against their theory. But I reckon the percentage is close to 0, regardless of gender...