This i my view.
I have one dd (now 13) and one ds (now 7).
Yes i believe their likes and dislikes are in part down to social conditioning. But you know what, social condition exisits in evryones life. Thats life.
I find gender roles damaging for both my kids futures. Dds interests have been Ben 10, disney princesses, dinosaurs, anythung pink and glittery etc. I have been into school and had a word because someone told her girls couldnt have a Ben 10 lunch box and the teacher did a general talk for the class about tgat sort of thing. Dd and ds (who also had disney princess phase) have been brought up that they can like what they want.
Ds has said a few times, since starting school things like 'footballs not for girl'. I question, gently why he thinks that (usually someone has told him it at school) and then we talk about how me and dd play football with him and how he would feel if we couldnt play. Which, makes him realise its bullshit. He now understands and often challenges these views himself.
I try my best to bring my kids up without gender sterotypes as much as possible. And try and model that behaviour with Dh.
However, if they have been invited to a party, i am not going to refuse to buy a girl something pink because i feel she has been socially conditioned. If that what her parents have said she wants, thats fine. If a boy wants a train. Thats fine too.
I am a feminist. I have never felt the need to look down on or educate other parents on the school run. Dh does a 2/3 of the school runs. Being a feminist have never caused me issues with any of the mums. Do i think that i would not do things they do? Yes. But its not my place to judge. Some of them i know well and we will chat if they are at ours. And one in particular has changed some things. But us just chatting. Not me telling or me judging.
Most parents are trying their best and doing what they feel is best. That may change. Its all in how you go about it. If you are making people uncomfortable, then you are going about it wrong.