I dont think will be of too much effect on the perception of the network or the faith in Bitcoin as the problem has been identified and future development would factor the possibility of this happening again,
bolstering security in the network/wallets/exchanges with protocols etc. that would reduce or prevent future recurrence.
In terms of mainstream, most see dollars signs and without knowing about blockchain wouldn't be here or there on whatever risk a possible flaw could have big or small.
Maybe you are right… Mainstream does not read those news or: Remember them long enough to make them think about blockchain in detail.