Dolls childish? Weapons violent?

For years now I hear strange things like:
Young teens (13yo - 14yo's) shouldn't be playing with dolls, that is childish - why?
Boys shouldn't play with weapons, that makes them violent men - why?

I will go into my thoughts on this below a bit.

Dolls
In a tribal community young teenagers have babies to spend time with and to practise on to learn how to handle a baby. The mothers of these babies are also there, or the aunts, grandma's etc. So the girl learns under supervision how to do this. In some communities those young teenage girls end up being responsible for the majority of the care and entertainment of these babies.
They carry them a lot when the mother is busy with activities which make it difficult to wear the baby. These young teenage girls have quite a bit of responsiblity, also within their community with helping with all the other adult tasks. They start doing those before they are getting a partner and have babies, in general.
So in general by the age of 13 to 14 they are participating in the adult world.
In our world they are considered children until they are done with their studies, which could be 26, so pretty much double the age of maturity in a tribal community.
By nature, children expect to be entering the adult world from about 13 - 14 years of age.
This is one of the reasons why teenagers can be difficult, they are treated like babies, which they are not. They are supposed to be taking care of babies, house, cooking etc. Of course in our world that will have to find other outlets than in a tribal community.
With this in mind I don't think its childish for a 13yo to play with a doll like it is a real baby and I also think that its pretty educational for them when mothers explain to them how things would work with a real baby, iso telling them off for being "childish".
I really do think that girls of 13 - 14 should be slowly but carefully get more taken into the adult world. Its really important for them in their growth.

Weapons
Another hang-up in our western world. Boys aren't supposed to play with weapons it makes violent men out of them.
I think this is rubbish, just examine what happens in tribes that live more natural.
There boys have a bow and arrow that they use and learn how to use from a young age. Of course its made to size.
But the learning starts very young, they need to learn to hunt, they need to learn that to be able to help feed the tribe later on when they are older.
At about the age of 10 to 14 they go out with the men hunting, give and take a few years as this is different in every tribe.
At some point they start with small animals and the better they get the bigger the animals they can help hunt.
There is nothing wrong with that, they learn to use the weapons and learn how to provide food. This is still a natural instinct in our boys.
If only more people would recognize that and work with that life would be much easier on all.

I have a 13yo and I do see how much she loves messing with our 3mos old baby. The baby also enjoys it and it does give me quite a bit of space to do things without carrying her.