For how long should people understand the importance to have bitcoins for emergencies such as this one?
Many people are still not aware of Bitcoin existence, thus banks are where they mainly save their money. But just like what happened to this woman, the risk of not able to withdraw your funds are always there because they're the ones who have full control of your money for being centralized. That's the risk that we have to take if we store our money to a centralized platforms. The point is, dont save all your money in banks, we cant be certain if our money is safe. Saving money through Bitcoin in a non-custodial wallet is much safer since you're the one who have full control over your funds.
and also the availabilities if Bitcoin to be used instantly is limited , meaning we can only see the Bitcoin in our hands but to use it is difficult as the acceptance is depend in which country you live and from the community to are dealing,
so yes people may learn bitcoin and wanted to use but the function is not there so we cannot blame people from not totally dealing and keeping this as banks is always ready to be used and offers them.