Firstly, that wouldn't be "the same thing" then. Secondly, Steele Dossier started with the right-wing investigating Trump, not the Democratic White House. Thirdly, what hundreds of millions in military welfare payments was involved?
But there can be no "sir, how DARE you" to Trump on the part of the DNC leadership, or indeed anyone who cheered on the Steele dossier and hoped it uncovered something juicy, without confronting the fact that Trump's impeachable mistake was, comparatively speaking, getting caught.
His impeachable "mistakes" are multiple obstruction of justice charges, emolument violations (they aren't even hiding it now), intimidating Federal whistleblower and witnesses,
and asking Ukraine to investigate Biden in order to get weapons from the US.