In some circles, boys are not supposed to be competitive and aggressive. Back in the 90s, an area preschool banned construction toys for boys because it was considered too aggressive and competitive.
Is it possible to have a gender-neutral functioning society?
Should men be less competitive and aggressive to allow women easier success?
I think it's extremely weird that you consider aggression to be a good thing. Aggression by and large is used as a negative thing, but probably also does have some use in an abstract way. I mean, we have wars of aggression--like what Russia did to Ukraine--those are bad. We have aggressions in sports, typically called unsportsmanlike or fouls because they are essentially cheating by going against the rules. We have aggressive behaviors against other people such as rapes, sexual assaults, murders, assaults, armed robberies, ...
Now, on the other hand, in an abstract way, we can imagine a person who is high energy, strong, and competitive. Would this person be a salesman? Do aggressive salesmen get the job done with high sales? Probably, but they are usually douchebags, liars, and pressure salesmen.
So exactly why is the word aggressive needed for this complaint? Why not stick to competitive, high energy, strong, assertive, etc?
Now, here is a story from me. Years ago, my son was on the soccer field, maybe 5 years old. Nearby, on another field, an even younger age bracket was being trained for soccer. A three year old was leaning up on the soccer ball, maybe trying to kick it, not sure. His father was on the sideline screaming at him, "BE AGGRESSIVE!!!!1111!1 GET ALL OVER THAT BALL! BE AGGRESSIVE!!!!!"
Do you think the father was right? I mean, what if he didn't yell at his son (aggressively) and decades later his son turned into a metrosexual? Maybe deep down inside, the father was also a metrosexual but closeted and was afraid he passed something down genetically to his son.
Okay, now imagine, you are there in that situation. How would you use your aggression to help the father keep the male in line with his social role? Would you use your aggression to spank the boy? Or maybe you could also start screaming "YEAH! HE'S RIGHT YOU LITTLE WIMP! BE AGGRESSIVE LIKE YOUR ALPHA DAD! DO IT! RAAAWWWRRR!!!"
As for me, personally, I was just kinda like, wtf.