Indeed, although we are using them, never trust them 100%. We have learned from some conditions so far, that although have high trust and reputation can also be crashed and then bankrupt. Moreover, centralized exchanges will also have certain interests something that will make one other competitor in whatever they want.
We do not need to trust exchanges to be able to use their services, but we must be careful and never store our coins where they are at high risk. I also do not trust banks, but I have to use their services, because modern society is now built in this way and it is convenient for me. We can choose for ourselves, take responsibility for ourselves or shift it to someone else.