Perhaps if MPs did have an actual argument, they would use it?

"When did it become permissible for Members of Parliament to treat select committee submitters with condescension, disdain or thinly disguised contempt? ... for men and women with impeccable professional reputations and years of service to the New Zealand community to expect their appearance before a parliamentary select committee to serve as an excuse for MPs to hector and insult them, and to ignore completely the content of their submissions?
    "Sadly, the answer to those questions would appear to be ‘right here, right now’. ...
    "All the evidence required to construct the case is readily accessible in the official video recordings of the Justice Select Committee’s hearings on the Treaty Principles Bill, particularly in the reception given to retired District Court Judge, David Harvey, by MPs representing Labour and Te Pāti Māori. ...
    "Why submit oneself, or one’s ideas, to such dismissive treatment? ...
    "Some have written-off [a 2021] incident [involving Deborah Russell] as just one more example of covid-induced madness.
    "But, if that is the explanation, then how is the extraordinary rudeness towards David Harvey and other submitters in support of David Seymour’s Treaty Principles Bill to be accounted for?
    "Why would Labour’s Willie Jackson feel free to chide a former District Court judge, whose career is as distinguished as it is free of professional and/or personal blemish, as if he were some errant legal backwoodsman, unaware of the intellectual powerhouses ranged against his unsophisticated opinions?
    "Why would Te Pāti Māori’s Rawiri Waititi imply that the submissions of a judicial officer backing Seymour’s bill largely explain the ongoing legal oppression of his people?
    "Why would the Labour MP for Christchurch Central, Duncan Webb, a former law professor, show no interest in addressing the legal arguments contained in Harvey’s submission? ...
    "The kindest construction one could put upon the conduct of the three MPs in question is that they are unshakeably convinced that the “European colonialist” ideology contained in the Treaty Principles Bill poses such an existential threat to the future of Māori in Aotearoa that any serious consideration of arguments submitted in support of it cannot be countenanced. Those offering such support do not deserve to be taken seriously and should not expect to be. ...
    "To rule out even the possibility of compromise can only hasten the transformation of select committee hearings into the 21st century equivalent of Soviet-era show trials, the sole purpose of which would be to demonstrate publicly the adverse consequences of wrong-think."

~ Chris Trotter from his post ' When parliamentary hearings on controversial bills become hostile echo chambers'