Good Question Seba,
I used to wonder about this early on as well. I failed a couple of ATPLs first go.
No one has ever mentioned KDRs in all of the interviews had over the years, it never comes up.
The only thing they would sometimes ask is "Have you got your subjects"
One reason they do this is that if you have got your ATPL subjects the operator knows you wont need to be taking time off in large blocks to go and do them.
Getting leave in GA can be hard, especially if you are working in a remote location. Having ATPLs knocked over before you get your first job can be advantageous.
Good luck in your endeavors
BAz