It doesn't matter if you find some sort of utility for the runes or not. Storing jpg's on the blockchain isn't Bitcoin's purpose. Being a electronic cash system is. That's the utility and the only utility a currency needs.

Of course we can add more utility to the blockchain but if anything has a negative impact on the blockchain's primary purpose (especially if injected via an exploit) then it has to be fixed to ensure the functionality of the software "as intended".