Her book says their friends were open to it but wanted to seek legal advice first, but by the time they did this the plan was abandoned. I don’t think they refused but they felt uneasy and wanted legal advice before attending, which was understandable given everything that had happened.
I don’t believe anyone here would happily ping off to another country and hand themselves over to the jurisdiction while leaving their kids back home, knowing that jurisdiction had been making wild accusations and already arrested innocent people.