Paywalled articles are still openly available if you politely email the researcher. While we should strive to have no barrier, if you can’t afford to publish openly those who need the research can still acquire it under the table. Having research unpublished because the researchers could not afford to pay the fee is worse than having the research published in a closed journal.
I’ve gotten a few dozen papers from closed journals that way, and I’ve never been told no.
Henry Kissinger, War Criminal Beloved by America’s Ruling Class, Finally Dies