Oh no, I'd still nuke everything from orbit should I find anything indicating a local exploit succeeded. But the thing is: if on one system a local exploit has less probability to give root, then the probability that on that same system I'd know I need to nuke everything from orbit would be higher than on a system where root is easier to obtain.

I was however answering to the part about subverting sudo: and I both agree (it's totally trivial to abuse sudo) and disagree ("everybody uses sudo") with the part about sudo.