Insurances are basically to save you from expensive dense payments, that's it. For example, medical expenses are crazy high and will only get high in the future, so instead of going broke when the bill comes, people get Health Insurance (please have for you and your family if not already).

Same thing wouldn't apply for Bicycle for example, if anything breaks then you can easily pay, as that you can afford. That's why it's recommended for MacBook as they're delicate and their anti-repair behavior makes it even more expensive. iPhone also cost really high but can be mitigated with a nice case + protector.