Even in more progressive areas boys are socialized differently. I’ve been in a field where I see early childhood until middle school for years now. And girls, from the beginning, and raised more strictly. They have more care in their clothes, their meals, and the skills they are taught. They rarely fight, and if they do, it’s not on impulse. My theory on why people often say “boys are easier” is because they absolutely neglect them. So the onus is on 3rd parties to often teach them basic skills and rule following, to control their impulses, etc. Even in K-5, boys are the ones who are telling their teachers to fuck off, leaving the buildings without permission, fighting, etc. Parents blame the teacher/staff, if they are present at all, and antisocial behavior gets rewarded again and again.