I'm confused what problem this is trying to solve.

Drawing is a viable strategy. If you think you are going to lose but can get a draw instead (via, for instance, ctrl+k'ing your ACU and taking the other down with you), then... why is that bad?

It forces the otherwise-winner to play smarter and removes otherwise suicidal options from becoming winning options.

It also makes room for some clutch plays such as being able to kill your opponent within seconds of when he kills you, even without ctrl+k.