First of all, nobody believes that Marie Antoinette actually said ‘let them eat cake’. There is simply zero evidence of anything even remotely like that.
Second, are you saying that Marie Antoinette had a significant role in price controls for longstanding problem of bread prices? I mean, if she was an out of touch deubtante, who would listen to her on economic policy? But I am interested in what her role was in those policies. In any event, price controls are always favored by socialists and are usually popular with the masses, who stupidly think they will help despite all evidence to the contrary. Her biggeset problem, as far as I am aware, was that she was not French (an Austrian) and was a very big spender.
She was married to King Louis XVI, out of touch or not, so people had to listen to her, even though she was very young and about as dumb as Kamalla, and much more vain. She was notorious as a big but foolish spender. At one point spending a million sous for a diamond necklace that turned out to be fake.
The younger Lord George Gordon, whose attempt to petition Parliament against giving citizenship to Catholics (he was a Protestant at the time, and an MP) caused a huge riot in London, was arrested for slandering her, making fun of her necklace purchase in a newspaper. Actually, he had converted to Judaism and wanted to leave England for Poland, so that slander case was just the pretext, to punish him for “inciting” the big riot and also converting to Judaism. He died in Highgate prison, in a luxurious cell provided courtesy of the other Gordons, who didn’t like to see their baby brother treated like a common criminal. Cancel culture goes back a ways.