DeFi is the real deal now, the fact that we have a loss of 500k does not stop the potential in DeFi projects, things like this are bound to happen. Hackers are crazy these days that they can hack anything. DeFi projects are doing well now and they can only get better.
It can be a home work for the dev of such defi to increase its security. Im feeling worried to see that as there was a lot of possibilities if there will be another vulnerability in the platform. Any developers of various DEFI must try to upgrade their security and check the code anytime.