Just because individual parents can try and counteract the prevailing culture of pink = girls and blue = boys (much more difficult as they grow and are influenced by advertising, peer pressure and other adults) doesn't mean we shouldn't also challenge that culture and try to dismantle it.
I'm not sure that it is meaningful for an adult woman with teenage and 20 year old daughters to say (as one did on BBC Breakfast this morning) well MY girls played with Barbies and are doing a science or engineering based degree and I played with Barbies and I am an engineer. Firstly gender segregation of toys has intensified in the last 20-30 years so she and her daughters weren't exposed to the "pink everything" version of childhood, even dolls and other toys marketed towards girls were less 'pink'. Secondly, toys are just one of many influences, maybe in their case things such as having an engineer for a mum gave them a broader view of what women are capable of than average girls.
Also, it shouldn't have to be the case that you either totally conform to gender stereotypes or completely confound them. Its okay to have a variety of interests, but that's the point, we have to give children the opportunity to enjoy a variety of different interests. Not steer them into rigid stereotypes so that girls who might be skilful footballers and boys who might be talented ballet dancers never find out because they never have the opportunity. And those who are given that opportunity have to have unusually high levels of confidence/stubbornness/obliviousness/support to not give up their hobby when faced with scorn/isolation/bullying/teasing from their peers.
At some point my toddler DS is likely to realise that he is expected by some people to like certain things and reject others, not because he doesn't like them but because he was born with a Y chromosome and a penis. In the meantime I'll continue to offer him a variety of toys and to make sure that we have some pink coloured items so that is 'just another colour' rather than something unusual to be avoided.
I don't know how successful my subverting is, but I have made sure he has things like a pink car, pink balls as well as blue/green/red/yellow in his ball pond, that he has a doll and animals like cats and horses that are often seen as feminine (as opposed to dogs and dinosaurs) and he has pink and purple vests, socks and cloth nappies as part of the rainbow of other colours. Of course he has dogs and will have dinosaurs too.... not least because his mum LOVED her dinosaurs as child. I'm trying to avoid him seeing pink as off limits, as well as having more gender neutral versions of traditionally feminine toys - like his doll is an IKEA one.
Practically, I have tried to get things which I'll use again with younger siblings of either sex.