From a practical viewpoint, the question is simply whether the money multiplied by the chance of success is a better option than the money needed to rebuild. But I'd rather compare this to a natural disaster you were ill-prepared for. A lightning strike or tornado can also wipe all your data. You can't negotiate ransom with nature. And giving in to ransomware makes it worse for everybody else since it makes ransomwar…
On three occasions in my career I’ve been involved in events which led to large scale data loss. The first time the backups failed, and there was no recovering from it, ever since then I’m religious about testing backups. If you’re in a position to just restore from offsite backups not only can you just flip the bird to people trying to ransom your data, you’re also in a good position to deal with anything else, up to and including the data centre containing all your servers being burnt to the ground.