PrePub - Ascendance of a Bookworm

I kind of expected Wilfried to essentially become the next Bonifatius, i.e. remain in the noble's quarter as both the next Knight's Commander, and a backup archduke candidate, should someone need to fill in for the aub, while one of his siblings becomes the Aub and the other the High Bishop, and Henriette as the fourth child and young enough for the royal decree that forbids marrying out of Ehrenfest to run out, by the time she can marry, most likely going to be married into another duchy.

I suppose I can see the arguments for becoming Giebe Gerlach, but with their numbers and especially their combined mana pool having diminished by Rozemyne and Ferdinand departing the duchy, can they really afford to turn Wilfried into an archnoble, and thus lock him out of supporting the foundation and all else that comes with being an archduke candidate?

This seems especially odd, with them just having had a front-row seat and getting caught up in the whole mess of Ahrensbach - a greater duchy - falling apart in no small part due to their archducal family shrinking to a dangerously small size.

This feels like Sylvester is being a bit naive and idealistic, prioritizing faction politics and emotions over partical issues again, like his refusal to take a second wife did for a far too long time. If Florencia's latest daughter and one or two children from Brunhilde were already baptized, I'd fully understand it, but in this situation it's rather iffy to me.