Stakewalls and roof pieces (including cross beams) ignore rain damage - wooden gates do not, becoming a weak point on a basic perimeter. It can be difficult to get a cross beam to sit on top of a gate, but a horizontal beam clips on just fine. Then you can place a cross beam - or go nuts and make your fence double high (blob event proof your crops & boar). Then you can remove the beam again.

Placing stuff just to get clipping and then removing it again is a decent amount of my valheim building, though I'm pretty novice. E.g. you can get a half roof length eve by using tiny wooden bits off the top of you wall down and out, stick an angled beam off of that to start your roof and it should touch the top edge of your wall in the middle of the roof piece.