As far as the demonstrators looking too old to perform EDM, you should consider that EDM has around since the 80’s, so some of the genres original practitioners could surely be senior citizens now. But I understand the sentiment, as it’s always amusing to me to see elderly musicians performing music originally marketed to youth culture. Look at the surrving members of The Rolling Stones for example. Aren’t they in their 80’s now?
They’re still rockin’, so more power to them