Ok, but if you assert "it doesn't interact with the rules" after people have suggested "Hey, maybe it should", then you're being nonresponsive to the discussion.
And if you assert "it's totally dependent on where you're digging" after folks suggest that rules for digging could be relatively simple and abstract, that comes across like you're still stuck on the fallacy of the excluded middle. There can be a reasonable and playable middle ground between "no rules at all" and "heavy and detailed", and that's kind of the main design ethos of 5E.