There are quite a few modalities of regulatory capture in this world- they are complex mechanisms. So you're correct about wanting to find other instances of that kind of thing happening, but those instances do exist. So it feels reasonable to me to suspect a strategy of developing regulatory capture.

Alcohol and cannibis producers enjoy regulatory moats from "sin" taxes, and I can't install a septic tank or get antibotics without someone who has a license.

And I couldn't buy and AR in Colorado without a Federal Firearms Licensed dealer who used to bitch about regulations to high heaven while they sell me just the serialized receiver for a weapon I would have bought online without those regulations.

Noting those instances doesn't mean I don't understand why they exist. I spend some time volunteering as a health care provider and am happy that people have some standards around that care even if those "moats" can't quite keep MAHA people from bufo-toxin-ing their unvaxed children.

At the same time, it's important to understand that professional organizations creating "standards" are still industry-oriented organizations and are motivated by those interests regardless of how much folks complain about higher-levels of regulation.