Andrew Lloyd Weber is one of Britain's authentic theatrical geniuses. His discovery that a "show" depends neither on acting, content or direction but on staging has meant that his spectacular musicals are exactly the same whether playing in Los Angeles or Singapore.
Serious theatre in London has benefited enormously from this discovery. For example Murmuring Judges a serious expose of London legal life featured real taxis on stage, fake rain, and recreated interiors onstage of the Royal Opera House Covent Garden, not to mention a singing chorus line of full frontal (male) nudity, greatly enhancing its message.
To sum up, because of him, everything is now a musical.