I dunno mate, generalising that old-school thrashers are undecuted could seem offensive to some. Not everyone is into the technical aspect of things. Thrash is fundamentally about attitude not about mathematical precision and you can't expect everyone do be into the more meticulous parts such as actual recording and gear. I guess, rather than being uneducated, a better word would be indifferent to certain things which might be considered very useful. Fair enough, this might seem like they are against learning anything to help them improve the way they write, their sound in general, efficiency in the studio etc...but maybe its the way they like it.
Don't get me wrong, I'm close to agreeing with you here, but uneducated might be a bit harsh.