Just speaking for myself, but I didn't really mean anything about "personal canon". Doesn't matter to me that much. It's just that just at a glance, it's easier to take ENT, a 21st Century series, as a prequel to
Star Trek (2009), a 21st Century movie, than it is to see it as a prequel to something from the middle of the 20th. I really don't think that's some weird, "out there" opinion.
TOS is my favorite series. Having said that: TOS is irrelevant. Yes, I said it (don't even
think about quoting that out of context!

). ST XI+ is what's current. As long as I accept ENT under ST XI terms, who really cares about how I think it connects to TOS? If you do, then you care a lot more than I do.