Whilst I have been not been involved with folk festivals for a very long time (Durham many years ago) I am now concerned with sport admin.
As you ask I play lawn bowls, and am involved with the County admin - although this is thought of as old man's marbles the top players in this country and worldwide are no more than in their 30s.They would not, however, be able to play if there was not someone to organise the event.
The comparison with folk clubs and festivals is that, as a pensioner, I am younger than many of those who work in administration.
The comparison, in both my sport and in folk music is that they won't survive unless younger people are prepared to take on the hard work.

In both cases there is a danger of failure due to apathy from the younger generations.