I see Matt Thornton's aliveness videos and write-ups and can't help but to agree with most of what he says. This is one of the reasons why I pushed this more random, more realistic attack training in our dojo and the sensei thankfully agreed that its probably a good idea.
Firstly, budo is not "monkey see monkey do". Smart monkeys think. Secondly, "aliveness" is not just a physical thing, but more so a mental attitude. So, I see nothing inconsistent with Matt Thornton's words and how you choose to incorporate that into your own training.... even if you come from a "softer", more "fluid" style of aiki.