But there's so many death/black/thrash/whatever metal bands where I also think there is a huge lack of all the things you mentioned. And, in contrast, I suppose there are also metalcore bands making intelligent music, or at least music that is no less intelligent than the average death/black/thrash/whatever metal band. What you stated sounds like an overgeneralisation to me. Both regarding the high quality of metal and the low quality of metalcore... (Sure, what e.g. Venom did was a revolution and metal would, at least, be different today without that. But there are so many black metal bands, for example, that all sound the same...so that I really doubt they are very "original" any more.)
You said you knew the right direction for metal to develop towards, which is simply your opinion that I cannot really share. This is why I reacted the way I reacted.