I absolutely agreed that an insider is directly or indirectly involved in what lead to the hacked wallets of coinbase users, it has become glaring that centralized exchanges can never be reliable and trusted in storing coins, past hacking events related to CEX has proven that reliability of those type of exchanges is very risky, because some of their scrupulous employee who can never to trusted will surely compromised, I think experienced crypto enthusiast knows the implications of hodling their coins in CEX exchanges it's up to every newbie to research on ways of securing their coins too.