Yup, this is very much part of it. But overall, it’s the tightening of a thousand screws rather than One Weird Trick.
In the House, in addition to the tradition changes that MondSemmel mentions, successive speakers over time have modified the formal House Rules iteratively to (generally) consolidate more power under the Speaker in a bunch of bureaucratically technical but important ways. (E.G., the Federalist Society on the right argues that Gingrich’s decision to cut committee staff sizes and impose term limits for committee chairs nerfed the power of committees relative to the Speaker https://fedsoc.org/commentary/fedsoc-blog/navigating-the-rules-of-the-people-s-house). Note that some view the current Speaker as intentionally choosing to begin to reverse this trend as part of commitments he voluntarily made to his side of the aisle to somewhat empower individual Members, but this is seen even by his biggest fans as only a first step, and certainly not universally agreed upon even within his own Party.
In the Senate, similar trends are combined with a slow but fairly steady erosion of the scope of the filibuster (as well as the maximization of procedural hacks around the filibuster, such as how to use reconciliation), which de facto increases the power of the Senate Majority Leader in closely-divided Senates (most have been for the past 20 years). But this is not as far along as in the House, and various Senate Majority Leaders have approached this question differently, even within the same party, so bright line conclusions are harder to draw here. (E.G., Reid and Schumer had somewhat different approaches from each other, as do McConnell and Thune)
Something I believe:
The reason that society isn’t currently freaking out about AI taking artists’ jobs is mainly that we’ve historically thought of artists’ jobs as inherently precarious, and so a new report of them being precarious for new reasons doesn’t surprise anyone. The moment it takes a “so stable your mom wants you to study it in school” job, that all will change for the stable folks, but not the artists, unfortunately. After all, they’re just artists...
(If you say that this means that I don’t care about artists or their financial challenges, you’re wrong. This sucks, I’m predicting, not endorsing, a likely scenario.)