The engineers are definitely involved. This doesn't mean that we will stop creating things which can hurt people, but people who are involved in the pipeline need to be held responsible for supplying/maintaining to those with bad intentions.

So making guns is okay, supplying them randomly is illegal at most places because they just do harm.

Similarly there at these companies the engineers working to maintain the infra making it all possible.

Engineers need to understand where their work is getting put at.