I'm quite keen on this style of "good neighbour" fence (rails and palings inside the posts):
However, all the pictures I've been able to find online just seem to have the rails skew nailed inside the posts. A couple I have found might use pocket hole screws. Neither of these seem particularly robust to me. I would usually either bolt or batten screw the rails on to the posts, which seems way more robust (I'm in coastal Wellington so the breeze can get up).
Is there something I'm missing here that makes this design more solid than it looks?
Edit: Dagnabit. Image is from Calgaryfence.ca but had to copy + upload to GZ due to https requirements. No copyright infringement intended.