idk if i can agree on that part, since i dont play low trash like this. But since the building part is a huge skillgap in fortnite, its also not that much about aim too.
in csgo i counted everythink as "brain" like movement, economy, timing, utility usage, decision making,....
and in fortnite building would be much higher than aim too. cuz if u can outbuild someone, u get advantage and dont need aim at all.