A lot of these rules happen at the regulatory level so lawmakers don't typically understand them in depth and get a lot of their explanations from utility lobbyists or the regulatory agency itself, if they even get involved or pay attention. The dramatic increases being directly linked to data centers is big enough for consumers to notice though.
That's why these independent counsels are pretty important such as the Maryland agency mentioned in this article. Since utilities at least on the distribution side are pretty much monopolies people have no choice but to pay the agreed rate.