In my DC's south London primary - not leafy - all staff including the head were addressed by their first names. With absolutely no loss of authority,
It was Outstanding Ofsted, got excellent results despite having very high % of every index of deprivation and disadvantage, and bullying was all but unknown and dealt with immediately and effectively. A happy school with good behaviour.
Perhaps good teachers with strong sound pedagogy do not need to rely on titles to maintain respect and authority.
At secondary there was no 'miss ./ sir', all staff were addressed by their title and name. All titles were considered normal by the kids - Ms, Miss, Mrs, Dr, Mr - and the just remembered the title alongside the name. London kids have no problem with Ms - they see it and pronounce it as normal. Just as they learned to use names from Vietnamese, Nigerian, Polish, Irish heritage - a range of things not familiar to begin with to any given child. No fuss.
Meanwhile I am surprised that as a teacher you are not discerning the difference between criticising / critiquing a system and 'commenting negatively' about individuals who of course can use their own free choice as to what to do. Free choice for the individual does not necessarily mean that the over-riding default system is not built on sexist principles and expectations.
I am an atheist who celebrates Christmas. If a Christian tells me it is a religious festival at heart, I can only agree - and still make my choice to celebrate it in a cultural non-religious way. But I can hardly pretend that I am not continuing a European Christian tradition - because it just is!
As the tradition of women changing their names just is based in patriarchy.