Ah, well if you take the view that congress cannot delegate these powers, then there can be no executive anti-trust office, so this whole thing is moot.
However, this isn't the mainstream view -- but a radical departure of several hundred years of mixed-power agencies. See, eg., archetypally, The Fed. A wide variety of federal agencies are mixed powers, esp. regulation of businesses by the executive which is a legislative (administrators make rules) and judicial power (administrators decide if they apply). This is uncontroversial, I know of no view on this which denies this claim.
The "non-delegation" principle is about how far congress can enable other branches of government to exercise delimited forms of executive,judicial,legislative power. The "none" view is an extreme minority. No one things congress can hand the president the power to legislate. Most people think congress can create a framework in which certain details (eg., food/drug laws) can be created by agencies. That's the basis of the entire modern state, in any case.
There is nothing in my comment which can be "a lie", because its offering a theory of government which the original commenter lacked. Its not clear what theory of government is supposed to enable an executive anti-trust office with the power to intervene without a court, that isnt subject to presidential oversight.
People down-voting because they disagree with the theory of government offered is just as confused. The point of HN is to reply to something you disagree with, if offered in good faith, not to down-vote it. However I dont think down-voters had rival theories of government, I think they just resented a hate-thread being side-tracked into an honest discussion.