Folk music is about different people doing different things that they've learnt to do pretty well. So unless the particular things you do pretty well is exactly the same particular thing as the honoured guest does presumably extremely well, no problem.

Every concert or festival I've ever been at has people operating at all kinds of levels, and all the better for it. As often as not the music that really gets to me isn't technically the best anyway, it's speaks to me for quite other reasons maybe.

A dawn chorus isn't just blackbirds and thrushes, it needs starlings and crows as well.