Although I completely disagree there should be some intermittent vulnerability to the cupboards, I understand the sentiment.
You should not have to collapse an entire building in order to raid it.
i appreciate the sentiment too, but disagree with the idea of making the game easier by having inherent "prone" times in a defence. it's a bit like a wall that disappears every 7 minutes so you can raid; it really is babying.
but i agree with you, you shouldn't need to collapse an entire structure to get into it. i think doors and windows should be weak, and the cupboard removed when the building parts get balanced out. players who get blocked in should be able to bash their way out within a reasonable amount of time. then the "remove" function wouldn't be needed anyway.