The intent of these ports are what’s called sacrificial.

Its so you can use it to the point of damage or accident. And are able to replace the damaged bit.

Phone cases/tempered glass cover. Lens covers for NVGs. Paper cover on a hard cover book. Sacrificial to avoid damage of the good.

It’s an incredible design feature they can tote as a modularity function. But the more important feature is that it’s replaceable/upgradeable.