Face covering in public is a problem. Humans communicate largely with their faces and there is something deeply wrong about hiding your face from others in a space you share. I feel insulted that others choose to do it on our streets.
The counter argument to that, is that in a free society you should "get used to it". If more people wore Burkas then you would get normalised to the practice.
There are plenty of people who dont like other things that people get up to, like two men french kissing in public. Forty years ago it caused great outrage when the BBC showed that in a documentary, now it is probably a crime to be offended by it.
The good old principle of a free liberal country is that if it doesnt hurt anybody else, you should be free to do it. Even if you are part of a vilified minority.