All abolishing the monarchy would do is enable people with more wealth and status than me, many of which who I can expect to not only hate people like me far more than the current monarch, but to have self and group interests that are directly contradictory to my own wellbeing, along with ideological motivations that, if carried out, would be extremely harmful to me.

At this point people who think the monarchy should be abolished get filed under "malicious actor who wishes to put themselves, or their ideological co travellers, as my master instead, or wishes to use the de facto power vacuum to enrich themselves at everyone else's expense", i.e. they put themselves into the "I would probably be better off if this person were to be dead" category.