I really don't want to use this comment to shame people for getting their start in game design.
But it's really weird to me to see a semi-major internet publication like this highlight comments from a guy with a youtube channel that has 508 subscribers and who has only been a professional game designer for 2 years as head of an indie studio, according to his LinkedIn. Sure, anybody can teach game design and even teach it well. You don't have to be the next John Carmack to do it properly, but it's weird that this guy was highlighted for an article in this way.
Also his first game with the indie studio is some sort of indie MMORPG that's a parody of RuneScape.