I'm with you there, but I also think that both still came out too quickly. I wish I had access to the post, but my old GM made an amazing diagram. It compared ALL raid content from the start of WoW until now. It showed the average time for Heroic (now Mythic) guilds to get through a boss. It compared top world guilds and bottom-of-the-barrel guilds in terms of clear times.
It explained how HFC definitely came out too early, and that all the raid content should have been spread out more. When BRF was announced, forums blew up telling Blizzard that its too soon (TM). We weren't incredibly crazy progressed, but we still were a Mythic guild that cleared content. We were working on Mythic Imperator when BRF was announced, and of course, then it came out. We never stepped foot back into Mythic HM after that because why would we? BRF content and gear was better.
Then HFC was announced when we were working on Mythic Blackhand. At the time of the announcement, it was something like .80% of the raiding populace (as measured on WoWProgress) had cleared Mythic BRF. .80%. That is such a ridiculously low amount. By the time HFC came out, I think it got to around 1.6% but I can't really remember. Still -- such a small amount of Mythic clears.
I do understand that Mythic isn't ALL the content, and is only just a small frame of reference - but it still can help show that content was a lot shorter than it should have been. All of this led up to why HFC has been out for a very, very long time. Less time on initial raid tiers means more time spent being stuck with the final raid tier.