Maybe you wouldn't care about crowd pleasers, but with you (and me) he is preaching to the converted, HOWEVER, at this event, there will be a large portion of the audience, who are NOT hard core Bowie fans, and he has to please them as much as us (moreso, as they are in attendance). Five years, although a great song, takes its' time to get going and is (and this isn't putting it down) a bit dirgelike, to the non-converted. Whereas Queen bitch can be a high powered, rocking track, guaranteed to get people excited. If one song is all he has, on his first live appearance in over a year, he wants to make people prick up their ears and put down their flutes of Champagne.
Dignity is valuable, but our lives are valuable too.