These specs protect you the designer from the customer's idiocy. They stablish environmental limits for your operating equipment.
even EMC limits help you , because you KNOW that your kit is not a class 1 medical device or whatever and that it doesn't matter if it fails when overloaded, provided it fails gracefully and comes back from a total supply failure safely.

If YOU as the designer decide this equipment is only to work in an office, you write the spec to suit. If its in a car, there are standards (probably SAE) for the vibration limits in various positions.

So pick where you want to use it, then write the spec. Don't expect an office spec to work under the bonnet of a fired diesel engine on a road digger !

Steve