because it would take far less time for them to add a text line that cues an action that already has the core structure implemented (ie, NIN using tools for magic, so they already have a model for how to make it use the key) vs. actually fixing the problem with the way chests spawn on top of/inside each other?

Fixing the chest spawn issues would be a lot more elaborate than sticking an extra text line in the menu table that link to a small batch of commands to -1 your key inventory and open the chest you are currently targetting.

I'm for either/or---fix the chest spawns so they actually pay attention to collision rules, or add the option to open the chests with a key to the menu. Either one would vastly improve the probelms people run into with selectively opening chests.

If you are just spamming keys to pop all chests, this doesn't affect you in any way, it is only something for those trying to be more selective with what chests they open/destroy.