Quite a rush to judgement there.
"Subjects" is the correct term here as they are not just citizens of single country.
You assume forelock-tugging attitude and royalist brainwashing where there clearly is none.
None the less no ill will is born, such ignorance is expected from those that spout of their freedumbs when they cannot even fire or prosecute their own elected civil servants.
Nothing stops Canada from severing those ties completely by the way, if they wanted to they could do this easily, and the same goes for Australia and NZ.
Give it a couple of years as we've got another one in the pipeline and we don't put them too close together.
But tacitly admitting a poor cost/benefit with a reductio ad absurdum argument is not a great start anyway, because the actual situation is not an absurd one and margins matter.
Stripping most of that funding from the useless crown representative and entourage would be a great idea. Could be done tomorrow with acts of parliament and executive with no fanfare and no need for constitutional grandstanding. The fact they don't gives the imagination a good starting point for how much it would cost to be a republic.
https://www.theguardian.com/uk-news/2021/jun/02/buckingham-p...
(They still refuse transparency on that, so it might still be ongoing for all I know)
As for democracy, the arrest of Republic protesters during the coronation shows how hollow that claim is. The UK is still a nation managed for the benefit of its feudal elite, as seen with institutions like leasehold or the fact there is no property tax on their holdings.
You’d have a much less risible case with the Scandinavian or Dutch monarchies.