I’ve often given this advice myself, if you get hit with ransomware, you can recover if you have a decent backup plan that gets you an unlocked copy of the data that the ransomware encrypted.
But, that was before the hackers changed their game plan, and now started taking data as well as encrypting your copy of it.
“Unfortunately, that sort of model is being blown up by the Maze and Sodinokibi (REvil) ransomware rings, which have adopted a model of using stolen data as leverage to ensure customers will make a payment. Even in cases where a victim can relatively quickly recover from a ransomware attack, they still will face demands for payment in order to avoid the publication or sale of information stolen by the attackers before the ransomware was triggered.”
Now, you really have to avoid getting hit, which makes education, and prevention much more important.
But still, have good backups, lots of other things are a risk to your data.