Yes. But at the same time, it's easy to get into "blame the victim" mode
Having full blown security could mean nothing is done easily anymore
Prosecuting is important
Having full blown security could mean nothing is done easily anymore
Prosecuting is important
One could argue that the victims in this case are the people whose profiles had been hacked.
As for having full blown security getting in the way of getting stuff done, try replacing "Twitter" with "Equifax", a company that handles arguably more sensitive data and should have the "full blown security" you mentioned.
Did they suffer any tangible consequences?