You aren't reading wrong, though it depends on the effort, 'VAM' alone doesn't really mean much without context of climb type/duration. Pogacar and even some of Vingegaard's efforts were close and sometimes exceeding Pantani/Riis/Mig on the climbs, rather than the '10%-15% less' than he thinks here.
Pogacar's fresh FTP over an hour is at least close to 7 w/kg, form/weight dependant ofc.
Tl;dr Attia is a charlatan, no more qualifications in exercise physiology/related than anyone on here (zero), his speciality is the classic 'longevity medicine'. I'd also expect most people on here to have a better grasp of the basic concepts. Having said that I think it's good Pogacar is doing this sort of interview, though just wish he would've chosen someone different.