There is this one particular phrase that always comes up in most of our discussion concerning Bitcoin, and this is "Not your Keys, not your Coins." Thiiss very prrinciple is taken seriously by many of persons her, but I noticed that there are still a good numbers of Bitcoiners both the experts and even the newbies that still relies on custodial platforms. A fellow Bitcoiners once told me that his preference for custodial platforms is as a result of "it's easy access and convenience and even claimed that it had a stronger security measures." But most of what he said don't really add up if we take a look at the collapse of FTX in 2022.
It's only lazy people that would prefer centralized custodial platforms to self custody wallet. If you value security and privacy a lot, you won't be thinking about trusting a CEX over a self custodial wallet where you're in charge and responsible for your coins.
What makes most people use custodial platforms like CEX isn't really about convenience it just for P2P trading whenever we have to with our coins. Op am sure your coins has never been held in siege by CEX for no good reasons while they give mandatory request for provision of specific documents that you never had thought of providing. Maybe by then you would know if your so-called felt"fellow bitcoiner" was delivering to you the best of notes on bitcoin custody.