Of course. It would be foolish to think we could not choose to do so. However, hopefully, we would choose to do it constitutionally, by vote. Although, we have seen this far-right government attacking our democracy and making a mockery of it so who knows. With 61% of the British public still wanting a constitutional monarchy, I can't see a vote being carried out at the moment but I suppose a mob could try.
Sadly, you only have to listen to Johnson to hear any proportion of voters described as "the people" and the carrying out of what he wants - not what the majority want, as "the will of the people". I hope we are all more aware now of what can happen if we allow ourselves to be swamped by a minority. I am not sure that we are.
Just looking at the Religious Courts they seem to have managed to set up in America, with frightening overtones of the Taliban, I wonder why anyone thinks a republic is so great. Nothing we have seen here, under a constitutional monarchy, compares with what the minority has just inflicted on that country. They are not doing this via the government but through courts; courts politicised in favour of the minority. It's like watching the Handmaid's tale played out in real life. So far, their much-vaunted "republic" seems unable to stop them.
I would rather the far-right, at the most a quarter of the population, with the extremists many fewer, were not in a position to inflict their views on me in this way. History is repeating itself. So far, having a constitutional monarchy seems to have just about held on to our democracy. Hopefully, it would do the same with any other extreme minority.
When someone can show a system that works better than our imperfect one maybe the country will want to listen.