Exactly. Neither that comment nor its parent said degrees are necessary for education. Both were defending the value of education that extends beyond it's signal to the job market.
The only extent to which people are conflating degrees and education is the empirically obvious observation that most people don't get much actionable education beyond their time in degree programs, individual counterexamples notwithstanding.
Specifically, ggp that you're referring to was expanding on reasons why education is good beyond it's connection to the job market.