It's more complicated than you say.
- Compare given gold, not deaths. Sometimes 10-15 deaths can equal the same gold given as 5 deaths. Sometimes 10-15 deaths can equal three times as much gold as another 10-15 deaths. (Depends on if you acquire kills, how frequent you're involved in gaining cs). For example, if you're a 25/13 Talon, and you lose a game, it's very likely you're responsible for your game's loss, more than you are a good killer. Those 13 deaths almost certainly had significant shut down gold bounties every time.
However, if you are 0/10, it's not so bad after the first 4 or so deaths. You deprive your team of your presence, shorten your time gaining gold/assists by playing like this, but your death after the first few goes down to as low as 33g.
Furthermore, what are the deaths achieving? Rush in and die? not resulting in kills/objectives? Probably not worth it. Results in an Ace of the other team, and the feeding of yours? worth it.
As for low kill scores on adcs: Was Jhin taking turrets?
The players who climb the best generally do this?
a) If they can't survive direct confrontation, they focus on lane pushing, but are aware enough not to die.
b) If they can survive direct confrontation, they group, and push, and do high damage, but get out and flash over walls etc when dying and giving shutdown gold isn't worth it.
c) They avoid dying at all costs when their team IS dying, because it's likely the other team is already glut with shutdown gold and having another person feed them shutdown gold will make a recovery impossible.
Most games that I turn around are games where I've died less than 4 times where my teammates have died 10-16 times.