The scientific journal racket is all but capitalism. It's largely rentism disseminated and fostered by entrenched state and institutional interests and status quo. These publisher's devised a scheme where they not only force highly-educated and trained specialists to produce cutting-edge work for free but also afterwards demand high fees for them to access that same work.
The “ideals” of capitalism were shallow post-hoc rationalizations that came after people called out the problems resulting from the mode by which the elite mercantile class had replaced the feudal hereditary aristocracy as the class around whose particular interests the political and economic order were organized.
It was an improvement over feudalism, but the subsequent improvements have occurred with the general replacement of capitalism, in its original sense, with the modern mixed economy; capitalism is now a reversal of progress, not an ideal to aspire to.
This is completely untrue, classical liberals like Adam Smith and John Locke were espousing those ideals well before the word "capitalism" was even coined, it just used to be called Liberalism.
More so, Elbakyan herself says that the work she is doing is motivated by anti-capitalist thought.
Human nature is to sometimes, with a ton of exceptions, maximize resources and utility. This does not mean maximizing profit, unless you redefine profit to be a meaningless word.
That's just like, your opinion, man.
I could also say that finding ways to maximize individual freedom is the ideal of capitalism, and that's exactly the opposite of what Elsevier et al do, so they're the anti-capitalist ones and freedom of information is a capitalist ideal.
In reality, intellectual property is a controversial topic in libertarian/capitalist ideology. See: https://mises.org/library/against-intellectual-property-0
As for that being my opinion, it isn't. Capitalism has never been about maximizing individual freedom.
The foundational act of capitalism was the Enclosure Act. How does the Enclosure Act increase individual freedom? It doesn't.
You're conflating a specific subset of negative freedoms for human freedom in general. Which itself was a post-hoc justification for capitalism.
As for freedom of information being a capitalist ideal, why then is it that institutions like state secrets, patent law, copyright law and so on were created under capitalism? You claim that it is controversial, so why is there no capitalist country that doesn't have it? And why was it specifically lobbied for by early capitalists and created with capitalist?
This is just a nice fantasy that was established after capitalism already started. The very birth of capitalism, the Enclosure Act, was to restrict freedom to increase profit.
In fact, the original libertarians and anarchists were a movement that sought to end capitalism, precisely because of its coercion.
Your assertion is quite wrong and far-fetched. Intellectual property is not necessary to "perpetuate the capitalist system", at all, and asserting otherwise has no bearing in reality. Your right to private property and to own means of production does not depend in any way on the state being able to stop others from copying concepts or ideas.
Without the enclosure of the intellect, capitalism is unable to effectively organize research and development, leading to its failure.