Fucking calm down. Most people do it out a general respect for the family of the bride that has nothing to do with sexism. The idea that it's the father that is asked is just a hangover of tradition. The tradition of consulting the family is a good one in my opinion. To assume that everyone who "pays lip service to it" is an obnoxious sexist is ridiculous and egocentric.
I agree with you.. I think it's a nice tradition.