(My point is that incompetence doesn't make it morally ok that a criminal thing happens to someone)
2. There's a risk/reward component. Nobody likes to buy insurance. Resource constrained organizations will almost always choose to invest their resources to get MORE resources, not protect against the chance that something bad will happen. A rational organization should only invest in protection when the risk is so great that it's likely to interfere with its primary business (beyond their legal/moral obligation to protect information they're trusted with).
2a. If a $2m ransomware attack hits your organization every 5 years, and it would cost you $1m/year in talent & resources to harden against this, you SHOULD let it happen because it's cheaper. Just patch the vulnerability each time it happens and try to stretch the next ransomeware attack to more than 5 years away.
3. Of course there are many irrational organizations that don't protect against ransomware for irrational reasons (e.g. due to internal politics). There's not much to say here except that at some level of management (including the CEO & board) where people are not paying attention to what's happening, and they should go hire those hardcore nerds and pay them what they need to.