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That's fair, low elo players tend to be unpredictable and just aram, but i still think it's important to know your macro because you can create huge gold and experience differences through it when they aram and build leads that can make objectives nearly impossible to take for the enemy team, then again your own teammates probably won't listen though so you'll have to 1v9 with the leads you create
Macro is a great way to accrue leads but unless you have the knowledge to execute on that macro (which involves execution, especially if you are not at an advantage already), it's less reliable in the ranks OP will be at to begin with than just raw mechanical skill. In many cases, players simply don't know how much damage they deal or can take and that alone will win you a lane, and a 1/0 lead is devastating when applied with, again, the appropriate execution.
You don't need complicated macro play to climb at all, and you certainly don't need to worry about it much beyond "where was the jungler last seen?" for a very long time