Bronze players tend to lack parts of game knowledge. They may know their champion well, or they know how to CS, or they know how to gank, etc, but they miss other things.
I watched a game where a Soraka with 10hp ran through a teamfight where the enemy team had a Brand, Kayle, and an ADC (don't remember who) but no one killed her. Brand and the ADC were fighting the enemy jungler and top laner near the small river bush by baron pit, Kayle was trying to fight the enemy ADC and mid between that small river brush and mid brush, and Soraka ran right between the two fights.
Even in Silver/Gold I see people making mistakes that don't make sense to me.
Enemy has Vlad and Soraka, why does our ADC not have
?
Enemy Zed has killed our Azir 5 times solo, why did Azir buy
then get
instead of upgrading it to
first?
Enemy Syndra has killed our Zed 3 times, why hasn't Zed bought a
or at least stop engaging with his ult so he can use it to dodge her ult?