Apart from people (hopefully) not using their real names to make the ddos request, I would guess the investigation is done by a tech department rather than non specialist officers.
I don't think non technical people could pursue the investigation at all. I'm technical but not in that specialism so I'd have to do some studying just to get started.
Do you really imagine a patrol cop gets given a computer and told to 'find the suspect'? The legislators have someone else write what they put their name to, so that's not comparable.
We have nontechnical people making legislation about technical things, why do you think police are any different