A solution to NOT drill your track forks and have a normal front brake nonetheless

Not sure, it's something that needs to be TESTED ;-)
From my experience, ahead starnuts are f*ckin' tough and get even tougher when you pull them (that's the idea behind them), - AND - you could actually use 2 or 3 of them in a row.

I suspect the forces on the SFN/s would not be in their strongest direction (vertical pull).

2 or 3 would help like you say - also testing might show that they really are strong enough, I like the whole idea, but I would be tempted to avoid the SFNs - and use something with much more contact area with the inside of the steerer.

if the steerer angle was 0, then yes, otherwise it should not rise?

Whoops, sorry, good point, of course I am wrong here - the steerer / head tube angle is not likely going to be 0° !! Sorry not thinking when I posted that.