Only bank branches are closed on weekends, while online banking is open 24/7. I think you understand that because you are also using banks for your daily life. You are even using it more than bitcoin because it is still the main means of payment.
Like everyday bills, or on the weekend when you take the kids out, do you pay with bank or Bitcoin?

In all fairness, banking is not perfect, it has its own drawbacks and risks. We should not put all our trust in them and let them hold most of our money, not only because we do not have full control over our assets, but also because inflation will erode their value. But there is no denying that we still need it in our lives.