To confirm, the placeable doors can be lockpicked and bashed. That's not the problem.
The problem is either they block pathfinding or they don't. Opening them won't help. The object will still either block PCs or not (and the ones we currently have don't, which is why you always find them attached to walls). There's no way to fix this, because the game engine doesn't provide for placeable doors. At all.
The game engine doesn't, but the pre-written scripts in the CEP 2.4 starter module do. It's all been written by an 'Osmanthus', and from the looks of it, uses a destructible invisible object on open/close to create the block over the door, with the doors and their block palettes being part of the hak resources. All the scripts are set up in the haks, it just requires dropping in the placeable object and may require opening/closing once to set the invisible object placeable first.
On a side note this was used to very good effect on a zombie survival server (Revenge of the Dead by Zunath) where they had a very extensive placeable object crafting system for building fences/doors/houses etc. I know these placeable object doors, when scripted, works very well in stopping creatures for the most part. Hordes of undead NPCs is a good test until they glitch through as creatures packing up are wont to do.
Doors location can be found in this path location:
Test module with the doors can be found here:
https://1drv.ms/u/s!At_hxUiXUnQ1jnCHjEaj4Pzn4CiPSo even if it's not something that you want to put into the game in the carpentry, DMs may use them for events pretty easily if they wanted in future, it should all be set up. Just drop in the door only (not the invisible object), open/close it once and it's set.