The article doesn't suggest social pressure in the form of making fun. On the contrary, it suggests social pressure in encouraging girls to play with boys's toys and vice versa, although the former more than the latter:

> A 2017 survey from Pew Research Center found that a majority of Americans considered it a "somewhat or very good thing" to steer kids toward toys and activities traditionally associated with the opposite gender (though respondents were less enthusiastic about doing so for boys than girls).