My mother would have been devastated to miss it so it may be a generational thing. Not many of her generation left now, in fairness. I'm not sure it matters, though. If she fancies chatting on TV for 10 minutes once a year, sho's going to stop her? She is the queen, after all.
You fundamentally fail to understand the nature of a monarchy, sw. it is about continuity. It is about the holy mystery of divine anointment and the atavistic belief in the land and king being one. It doesn't matter who they are, it matters what they are.
We've had shït kings before - some of them so shît we've had to kill them and even Chas is unlikely to be that bad. However, we persist with monarchy because it works. One slightly irritating king won't change that.