Is there anything celebrities aren't qualified to comment on?

Are the famous not allowed opinions the same as the rest of us?

I'll take some naked selfies straight away just in case.

Well, of course they are. But those opinions carry no special significance as a result of the fame of the person holding it. Fame gives you a soapbox on which to stand, and an audience. It does not give you insight. Opinions are not validated by the number of people who hear them.

Sure organisations harness celebrity pulling and media power by bringing in the big names. For most I suspect it works; at least they get the coverage that might otherwise not happen.

I'd rather see them associated with established institutions than just inanely tweeting about whatever takes their fancy.

Its no worse/better than "The Queen" or "The Prince of Wales" being Patron of "Name your Organisation/Society"

Its their pulling power, not their wisdom that is being tapped into.

Did they actually write their speeches? Is it really their wisdom? 

Everybody's got an opinion about everything. You don't have to be famous to walk around spouting it continuously but the more famous you are the more it is likely to reach. It's the next interface in the process which makes the difference. When such outpourings turn up in the media, on websites etc., do we ignore them or start talking about them? That's what makes the difference.

My gripe about it is that people who are making millions are very committed in many cases to spending my income, which is significantly less.  They are often very out of touch with the struggles of life in the (disappearing) middle class.

That does not cast aspersions on many of the causes themselves, and of course as pointed out above it is their "pulling power" that is being used.  OTOH, in the realm of evidence to back up a claim, high profile endorsement is very low on the list of valid "proofs"... right there with anecdotal evidence.

The bombast and sanctimony can be a bit difficult to take from them at times...

The one that caught my attention recently was the tennis player Andy Murray twittering ultra negative thoughts to try and encourage the Scottish populace to vote for independence.  This could well back fire - particularly when he takes centre stage at Wimbledon next year.  Sports people should keep their noses well clear of public political debate and focus on their game.

Peter