Exchanges became the heart and soul of this industry. With a vast array of cryotocurrencies that exist on the market, trading them along with withdrawal and deposit options is surely a good idea not only to make money, but to also increase accessibility within the space. That's why exchanges, whether DEx or CEx, are integral in this industry.
Of course this is the case, and the function settings of many exchanges are still very practical. The frequent problems of centralized exchanges depend entirely on whether the founders are evil. This is the key.