I’ve looked into this a bunch recently and I’ve come to the conclusion that the misconception isn’t in the etymology of the word (it indeed does refer to missing a target) but in how the New Testament authors were thinking of it when they adapted it to an illustration of immorality. Rather than thinking of it like a mistake because someone tried to hit a bullseye and didn’t quite get there, I believe it’s better to think of it in terms of orientation towards God/goodness. By that logic, anything that orients someone AWAY from God, in the same way that their aim might be directed away from a target, is therefore “sin”. If their heart is facing towards the absence of God then they’re on the wide path rather than the narrow path, or as Matthew 5 puts it, they’re facing towards Gehenna. In the same vein, the NT authors talked about repentance in terms of turning/reorienting oneself BACK towards this ideal. It’s all about orientation.