It's good to see that somebody is already doing this as I had envisioned. Thanks for posting here.
Hopefully, it shows the ease of doing it that way for you at least. I'm sure it may never be known what this had to do with the historical design process.
It's a very valid possibility though, I would have to agree.
An axe with an inserted bit may be likelier to leave a pronounced bevel, as the wrought would work so much easier than the insert. All speculation there, I've only done a couple and they were all steel.