The quote I was referring to as “flatly wrong” is repeated above. Nowhere there or in the original post are the phrases “quasi-legislative” or “quasi-judicial”. Instead a much more general claim is made that the Congress’ power to constrain acts of the Executive is unlimited because they write the laws. That’s not at all how our system works.
The oral arguments in Selia Law v. CFPB may be enlightening here:
Just stop. The sentence before the one you said is flatly wrong mentions “independent agencies” — those are the “quasi-legislative” agencies like the FTC.
The other poster was right and you posted case law proving their point.