Not at all. The people who work in some government jobs benefit me, while others harm me.
Ironically, whenever anyone tries to defend government the first thing they mention is the roads, which are less than 1% of the budget and an even smaller percentage of personnel, and toward which the actual work is done by locally contracted private firms.
Sure, there are a lot of coordination problems that government tries (with varying degrees of success) to solve, but this doesn't put it beyond reproach. And it's certainly the case that even the US government has a fairly high degree of corruption, much of which diverts resources away from those in need toward those with political connections.
So in my view, governments derive legitimacy from their ability to solve coordination problems, adapt to changing circumstances, and stave off policies that incentivize corruption or put human rights at risk.
In the case of figurehead monarchies and the hereditary titles they grant, I think the best that could be said is that they offer nostalgia for a past era when such things mattered. In reality, vane humans strive to show status by meeting with royalty, since in spite of the monarchy's utter backwardness and absurdity, is still not something everyone gets to do, so the scarcity of the opportunity creates social value.
The reality of knighthoods past is that they were titles awarded to warlords in exchange for tributes (aka voluntary taxes) paid to a more powerful warlord (aka king) who granted privileges, land, etc., in exchange for those tributes.
This still happens today only w/o the pageantry: Imagine a US military truck with crates full of cash paying Afghan warlords for intel and mercenary troops. This is ugly business and there is no honor whatsoever in it.