It's all a case of "you get what you pay for" and how far you are going to go to "own your uptime".

If the backup path can become "overloaded", maybe you should have paid a little more for dedicated circuits.

If you have dedicated circuits, you might need to pay a little more for "protection".

And if you really want to own your uptime, you get to stare at KMLs to ensure you are actually getting diverse fiber paths.