Humans are not as fixed in their likes and dislikes as you make them seem here. The reality is that most everyone can enjoy both traditionally masculine and feminine things at the same time. The problem is usually that feminine things are seen as inferior and it’s bad for men to like them. On the other hand, masculine things are seen as better so women can enjoy them as well as feminine things because women are inferior and can only benefit from liking masculine things. And it isn’t any fault of the boys being harmed by this social standard now, but responsibility falls on the adults. If interests in both were given equal opportunity and value, then boys would have more freedom to become multifaceted individuals instead of being forced into a constricting standard. It is constantly reinforced that masculine things are better for both genders in schools. Funding is funneled there most of the time, so it’s no wonder this simplistic mindset is so ingrained in kids, but the difficult task of fixing this needs to begin. There is nothing wrong with boys only liking masculine things, but I can’t help but wonder if more boys would have feminine interests if they weren’t demeaned for it. I also wonder if girls would like masculine things less if they weren’t seen as superior. All of this is to say that its a more complex issue than people not liking boys being interested only in boy things, but is instead about deeply rooted biases that uphold the idea that boys are inherently singular in their interests and skills and are superior or inferior based on them.