[badminton1]

If in soccer the opposing team scores, who is to blame? the goalkeeper, defenses? the coach? the whole team? the referee? nobody?

Preventing goals means that the strategy needs to ensure good ball possession, and staying on the offense, to reduce the burden on the defense, to reduce the burden on the goalkeeper, who is the last line of defense.

If the last line of defense fails that's not an individual failure but a team failure, coach included, since the coach selects who gets to play, when and their roles.

Same in software: bad management passes the burden to developers, bad development passes the burden to testers, bad testing passes the burden to release management.

[badminton1]

Now, there are cases when everyone knows what to do, steps are taken so everyone is informed of it, but someone still decides to go against it. In that case the individual is at fault.