Who the hell keeps important info on his computer nowadays?
Or, even more basic, who doesn't keep back ups? You can get a terabyte of external storage for less than 30 bucks. That's more than enough for most people to back up every file, every document, every photo, every video they have ever downloaded/written/produced/taken/filmed/etc. If you need more, it gets cheaper as you go up - 100 bucks will get you 5 or 6 terabytes. You need zero technical knowledge to plug in an external hard drive via USB and copy all your files to it, therefore rending ransomware inconvenient at worst, as it can be overcome in the few hours it takes to reinstall your OS and software and copy your files back across. Or, with a little bit of knowledge, you can create a complete disk or system image (encrypted, of course!) to make restoring from your back up take only a few minutes. In bitcoin there, is no excuse for not having offline back ups of your seed. In general life, there is no excuse for not having offline back ups of your important data.
The fact that big corporations keep getting hit by ransomware and keeping paying up is testament to how bad most corporate IT is.