Because taking off the helmet doesn't violate your belief system, perhaps?
Because wearing the burqa is not about "convenience".
Having said that, I wouldn't care if you left your helmet on. "Seeing somebody's face" is not a right.
My friends and I thought about starting a new religion and wearing a helmet can be a part of it, if we want to.
I have no idea whether there is any law that dictates whether or not helmets are to be removed when entering a shop or a bank. I remove mine out of respect for those inside who might be frightened that I am a potential robber. All Motorcyclists in Qld are potential criminals anyway, thanks LNP.
I don't care what other women wear, it makes no difference to me regarding religion, fashion, heat and comfort etc. However if I follow certain social norms FOR THIS COUNTRY regarding the safety of those around me, then I ask others to do the same. Has it occurred to those who support the wearing of large face coverings and huge dresses in public areas (call them whatever) that it is not the religion many of us are concerned about but the threat to public safety. Forget metal detectors at Parliament house, how many guns or bombs can be hidden underneath those huge tent-dresses and innocently carried around your local school or shopping mall.