

That is actually not relevant, it’s whataboutism. The fact that someone does something bad doesn’t give you any right to just make your own rules.
Otherwise you could also say I should kill that friend that drove home after one beer too many, because he could have potentially killed someone.
I’m getting pretty old so I have experienced multiple waterfall projects. The comic should be
You want to go to mars You spend 3 months designing a rocket You spend 6 months building a rocket You spend a month testing the rocket and notice there is a critical desing flaw.
You start over again with a new design and work on it for 2 months You spend another 6 months building it You spend 2 months testing
Rocket works fine now, but multiple other companies already have been to Mars, so no need to even go anymore.