I get how important sounds are as it is an audio drama! But I'm not sure I see why the realism of drilling of the lock is such a focus, (don't think it could have some deeper meaning either) the story is about a zombie apocalypse after all!
Also, it's such an awesome show, production team are amazing and yeah sometimes may be some slip ups but not sure of need to focus on them/berate them. We even get to listen to all their hard work for free.
Just voicing my opinion!

Enjoy!