No, I'm talking strictly MCU here. Tony and Bruce are geniuses when it comes to temporal mechanics -- relative to Earth science -- but they're still latecomers all the same since they solved it so recently, compared to Ancient One who was dropping knowledge and clarity on one of those geniuses later in the movie, and the TVA's TemPads that make the Avengers' time machine look like a space hopper.
Speaking of space hoppers, I'm reminded that Doctor Who seems to change the nature of space and time and the flow of history and how branches and alternates work, seemingly every season. And that's *the* time travel show. If Doctor Who can do it and continue on for almost 60 years and counting, so too can any franchise that's fledgling in comparison. Star Trek also seems to have different methods branching timelines concurrently -- the Abramsverse is nothing new compared to TOS and TNG in that regard.