Five years of experience running Wizards is more than most of the 3pp heads.Chris Cocks had absolutely no RPG industry experience prior to becoming president of WotC 5 years ago. Current decision-making by him suggests he didn't learn anything about D&D in that period.
Not sure why you're focusing on Nathan Stewart, seems like a distraction given he was only VP of D&D very briefly and his career more about marketing than anything else - it seems very unlikely he's been closely involved with this decison-making.
Dan Rawson is VP of D&D, and he definitely has no RPG (or similar) experience.
It also ignores that he's been a gamer for decades.
Stewart is the VP of Brand while Rawson is VP of Studio. Both would be involved in these decisions. Rawson's first credits started appearing a year ago. He has a long history of gaming.
Considering people who have extensive experience gaming non-gamers is very gate keepey