It's only because of how the legal system works in the US, with ambulance chasing lawyer and where cases are decided on the emotions and societal moral panics of the people in the jury and negative brand image such cases can cause, not if someone is objectively right or wrong.

Meaning it's cheaper to pay people off even if they're legally wrong, than try to prove you are right but then deal with the bad publicity of the mob with pitchforks and torches who blames you for their kids dying. Keep in mind parents of that time also blamed violent videogames like Doom for it, so it's not like they were right about who was to blame, they were just looking for retribution from anyone they could.