BRITISH ACCENTS

Why is it that advertisers who want to have their products viewed as the best available, use announcers with British accents to gently and genteelly present their wares? It began with items like luxury cars or watches.  Now I hear the dulcet British tones touting things like replacement windows, food products, over-the-counter medications, household cleaners, even CPAP machine cleaners

I don't dislike it, I just wonder why they see a need to go fancy. There's nothing elegant about CPAP machine cleaners. A straightforward ad will do.