It's more robust than a loose dangly cable which plugs directly into the ONT. If such a dangly cable gets damaged, it may be necessary to pull a whole new outside-to-inside cable.
If the fibre is terminated properly in a fixed socket, then all you need is an SC-SC fibre patch which is easily replaced.
The fibre in the splice box is not spliced on mine, but use a connection of some sort, so if the fibre on the inside do get damaged it is easy to replace. I do wonder how the fibre can get damaged unless someone takes the ONT off the wall, the fibre come into the house and goes directly to the ONT which is virtually next to the hole.
Saying that, I know of someone where the fibre internal is really long and go from the front of the house, though the basement and into a room at the back of the house. So that could be damaged easily. the fibre is pinned to the wall well.
Adrian
Desktop machines Mac mini pro with macOS Ventura, also pc Ryzen powered with windows something or other.
Zooming with Zzoomm FTTP,