It's all in the design of airbag to have a weak seem where it will split and break for the airbag to deploy, this applies to all airbag in all cars.

Please note the extremely short time frame that the airbag must deploy to offer it's protection, hence the force is great and given the method of deployment, plastic parts will fly...

Airbag is considered as a secondary safety feature, hence it's the last hope , a few cut on ur face is consider less damaging than a crack skull.