He is not so much addressing the origins of the pandemic as the degenerative effects of the local Liverpool lockdown on his constituents, and the Tory government's failure to establish an effective test-and-trace system (despite paying private companies £12 billion to do so [money belonging to tax payers]). He is representing his constituents in his capacity as a member for parliament in the public forum, and so can only speak in their language, whether he believes that the pandemic is a pretense or not, but his words will nevertheless evoke discontent from both MPs and the masses towards the manner in which the gov't has responded to the pandemic, and the resulting consequences for society and the economy. This could represent a gateway for ordinary people to start doubting the official narrative.