Friendly reminder that Padme had a subplot in Episode III where she was going against Palpatine’s actions and she, Bail Organa, and Mon Mothma (her only appearance in the prequel trilogies) basically formed the early version of the Rebel Alliance, but the entire thing was deleted.
Apparently this subplot was cut at the last minute because Lucas wanted to keep the focus on Anakin, but tbh this would have strengthened Anakin’s storyline as well as the film overall. In the final scene of the subplot, Palpatine starts sowing seeds of doubt in Anakin about Padme’s loyalty to the Republic and to Anakin himself, and it helps show that not only did the Empire begin in ROTS, but so too did the Rebellion.
Plus, it has the added value of reinforcing how Palpatine essentially had full control of the Republic long before it formally became the Empire; by the time he declares himself Emperor, the title is little more than a formality. The Petition Of The Two-Thousand is a blacklist that Palpatine can use in the early years of the Empire to scapegoat any political opponents and eliminate them, silencing any opposition. It also gives Padme and clear and powerful legacy in the history of the Rebellion, almost as a martyr.
Finally, we have the artistic value - the contrast between Anakin and Padme, as their politics divides them and they each help to form the Empire and the Rebellion respectively, culminating in the final symbolism of them lying on their respective operating tables clad in black and white.
but that would have gotten in the way of padme’s entire plot contributions in ep3 being, a) getting pregnant, b) crying, and c) dying