I'm sure that many of us would love to do some of the Queen's official engagements but how would you feel about the 340 she did last year?
Granted that many of them may have been quite short, like welcoming foreign ambassadors at the Palace but some are pretty demanding for a 90yr old. I wouldn't fancy having to dress in my best, ensure that I look immaculate and then go out to meet loads of complete strangers, handshaking and making polite small talk, having to look very interested in things that might bore me rigid, stand for hours (10 minutes at a bus stop is enough for me!) at ceremonies, trudge round factories, put up with bad weather etc. etc. I bet she's knackered at the end of some days. I couldn't do it and I'm considerably younger than her. She also has to keep herself up to date with everything that is going on in the UK government and Commonwealth affairs. She may have the lifestyle of a wealthy person (and there are plenty of very wealthy people around who don't do anything like what she does; shall we chop their heads off, too?)but she works hard at an age when most of us would be putting our feet up and only doing what we wanted to do.
I agree that the minor royals are quite useless but they are really no different from any other members of wealthy families; just a bit more high profile.