In grad school I remember being encouraged to submit a paper to a journal that would have charged me a few hundred dollars to put it in for peer review, and I told my advisor no, I needed to buy groceries, I would not throw my money away for an extra line on my CV. He got all flustered and it was a great example of why higher education is so fucked. My advisor, who ostensibly understood my background and means, could not understand how such a relatively small fee would be so prohibitive. He was incapable of understanding that I was essentially unemployed while enrolled as his grad student, and every dollar of funding went to bare essentials so I could continue breathing. He had access to discretionary funds for this exact kind of issue (I found out later), and didn’t think to offer.
Without independent wealth and deep personal connections it’s incredibly difficult to succeed in academia, regardless of the quality of your research.