"All of these unfounded accusations"

They are not unfounded, the guilty party may well intervene on the thread before long with an explanation. It was a swift baptism of fire in internet folk debate.
However you look at it today's activities are pastiche. Even clubs who'd insist on unaccompanied traditional songs sung without any tonal accuracy or intrusive mannerisms - a small market and one probably incapable of local support - are dealing in re-enactment. Nothing wrong with that so long as it's seen for what it is and they don't make intellectual land-grabs on the wider folk estate.

I can't make my point better than it's all entertainment, singers of traditional songs aren't preserving anything more than public singing in member's clubs, which is fair enough. What's not to like?