Academic pain is different than real world pain. The politics/referral patterns/institutional inertia make it challenging for most academic pain physicians to offer the latest, greatest, newest therapies/technologies. I would suspect most fellowships aren't providing exposure to interspinous spacers, SI fusions, etc. I would suspect that the lack of insurance coverage makes it difficult to provide therapies like MSCs/PRP/biologics/etc in the inefficiencies of academia.
I would agree that anyone training in medicine needs to grow, but there is a need for trainees to understand what is snake oil and what is not. There's that old adage that 50% of what you learn in medicine will be wrong or inaccurate in 5 years, so we've got an obligation to keep learning, challenging, and improving our practices.
For what it's worth, I would probably ask more about turnover in faculty, industry relationships, opportunities for focused training on certain aspects, and things that help you understand the culture of a program such as how they treated their fellows during the pandemic.