It can't be stressed how vitally important this frame of mind is when dealing with problems of a systemic nature.
It's about shifting away from an ideological frame of mind, where emphasis is placed on enforcing what's perceived as right and punishing what's perceived as wrong, to looking at the sum of parameters that affect an issue.
Way too much energy is spent trying to find the perfect punishment for single individuals in narrowly perceived circumstances.
Arguing that traffic enforcement doesn't work fails to point out that in practice it's loose to the point of worthlessness. You only need to look at drunk driving convictions to realize this.
One doesn't "accidentally" drive drunk nor "accidentally" text and drive. That's not a mistake, it's an all too common cause of traffic fatalities.
Yes, folks are responsible for not doing these things. But we know people do them nevertheless. Not taking this into account when designing roads and public transport seems like reality denial. All that work to get a product that only works in idealized conditions instead of designing roadways so that you get less deaths from things people are doing anyway.