It means the discussion will lack the cross-talk and interjections from other political leaders.

Source: https://www.cbc.ca/news/canada/edmonton/highly-anticipated-alberta-election-debate-will-contrast-two-known-leaders-1.6847269?cmp=rss

So why do we have such a rigid structure and why do only a few debates, usually only the longer ones, include the short interjections from the floor microphone?

Source: https://www.libdemvoice.org/more-flexible-debates-at-conference-74026.html

With TGG, the ‘parts of speech’ – nouns, pronouns, verbs, adverbs, adjectives, prepositions, interjections, conjunctions, determiners and articles – together with some of their definitions became somewhat irrelevant.

Source: https://nigerianobservernews.com/2023/05/interpreting-section-134-of-the-nigerian-constitution-with-dead-english/