Anyone who tells you that adding new opcodes will scale bitcoin is either ignorant or malicious.  In this guy's case I don't know which it is, I've never heard of "the guy who's read more about bitcoin than anyone else I know" which is an absurd assertion and should tell you right away he's full of shit.  But in either case he's endorsing an attack on Bitcoin, it's really that simple.

Study BIP-119 if you want to know more.