If you loose your keys, you loose your coins and that feels different from banks. For those who have been in the game longer, what was your first impression when you realized how it actually works?
your first impression does not really matter as such. what matters is the truth about bitcoin and the whole ecosystem which helps protect you from losses of any kind. As a newbie there is going to be so many wrong impression you will have most of which tilt towards an ideal believe about bitcoin that are actually too good to be true. that is a common thing with most investors and forum users but with time, you should learn by going through threads on the forum which will guide you into real fact about bitcoin and not just an impression that is based on some random narrative you got outside.
As for your keys, it is as important as your coin so if you value your coin, you sure want to ensure that you keep your keys as safe and secured as possible.