Must we politicise the Proms? Or life expectancy? Or advertising?

We went to the first night of the Proms last week. Thinking it was all over, we left the auditorium just before Igor Levit came back on for a delayed encore in which he played Beethoven’s Ode to Joy (transcribed by Liszt) as an anti-Brexit gesture. We loved Levit’s earlier rendering of a Beethoven piano concerto, but were spared his political views, so it was a perfect evening. Two nights later, Daniel Barenboim took advantage of the Proms conductor’s podium to make an unscheduled speech in which he deplored ‘isolation tendencies’. All good Brexiteers deplore isolation tendencies, which is one of the reasons we don’t like a European Union with a tariff wall, but of course Brexit was the great conductor’s target. Leaving aside the right and wrongs of the Brexit debate, why do so many people just now feel entitled to use their non-political position to try to effect political change?