This is a classical game of mouse and cat.
The cybersecurity problems are not just limited to crypto exchanges. A lot of institutions are hacked , also very high class government institutions. It is not that exchanges are not thinking of their security but the hackers constantly find new ways to exploit some holes in their security.
That is true. That's why, consistent development on their security systems is a must. We now know that hackers also grow smarter as time goes by but that should be taken as a challenge to also evolve and grow smarter than they are and create a stronger and more improved security. This is a wake up call, not just to those huge companies with looming amount of money stored, but also to us simple individuals to be very cautious with everything and everyone so that our security will not be compromised.