The "That's one opinion" is increasingly irritating me, and can make it hard to listen. I spent this interview snapping, "You don't SAY!" at the computer every time Nuala said it. I mean, it's self-evident, isn't it: you're interviewing one person with a strong opinion on a controversial issue specifically in order to hear their strong opinion - with which others will, by definition, disagree! You don't have to pepper the interview with it like a margin of pedantic footnotes.
In this context, the sheer quantity of "That's your opinion"s come across as rigid disclaimers - absurd, unnecessarily hostile to the interviewee, and seemingly a pitiful plea for tolerance from potentially volatile listeners.
Meanwhile, the flow of the conversation is disrupted, and the interview becomes stilted and staccato, limiting the clarity and fluency with which the view you invited them on to share can actually be shared.
Lastly, I do think it has the dangerous effect of legitimising and increasing polemical thinking. Instead of inviting listeners to listen and reflect on a fully formed opinion, drawing their own opinions and potentially learning from it (whether in changing their minds or just strengthening their own arguments)... they're just shunted back towards an irritable focus on their own disagreement: that's me she's referring to! I don't share that opinion! And quite right, too! Bizarre way of thinking!
It all feels like a very sad indictment of where we are as a society.