TRX and USDD have nothing to do with the hack, so it does not significantly get affected, even though the exchange owner is the developer of the token.
Yes, due to the nature of their centralization process, they need regulation to force themselves to invest more in security. Besides hacks, transparency and accountability of the exchange funds are also worth considering, noting the FTX issues. But specifically about security, yes, since they handle users' money, they should take security as the main priority. Unfortunately, we are aware that many hacks happened both to DeFi and centralized exchange, but it shows they haven't made it into their top urgency.