The problem is that backing up data is fundamentally a management task. It requires skills to actually do right. People view backing up their computer in the same way they view changing the oil in their car. Just like there is no button you press inside the car that says "change oil", there is never going to be a backup solution that is easy to use for the regular user. At least not one that does a complete job is backing everything up.

Here is how I handle 'backups': I never do it. If the data is important, I make sure I store it on a device that is already redundant. If I take a photo that I really want to keep, I'll send it to dropdox or google drive or gmail or some place like that. Neither my macbook, nor my iphone, nor my linux laptop is the canonical living place of anything important. If any of those devices were to disappear, I will lose stuff, but nothing important. This system I've sort of subconsciously migrated towards over the past decade or so of hard drive failures and lost phones.