So in every country that has ID for voting rights, it is a threat to their Democracy.
The biggest triumph for the government in this is making people think its simple; France (or whoever) do it, so why can't we?
In this country we have no tradition of identity cards for the whole population, at least not since the war. Therefore a significant proportion of people do not have photographic ID. About 3.5 million, which is about 7% of the adult population. I don't know who they are, but I venture to guess they are unlike you or me in some significant way; maybe they're not online, they don't have English as their first language, they are somehow disadvantaged. So telling them to get down to the Council Office and get their photo taken isn't going to hack it, I'm afraid.
Requiring them to get a photo ID essentially excludes them from voting, so that's bad for democracy.
Other countries, such as France, have a tradition of ID cards for everyone. You may think that's a good thing or a bad thing, but its something we don't have, and trying to impose it now will mean that people will be left on the side-lines. So while the country tries to implement a completely unnecessary system, people become disenfranchised.