he's making sure the battery life is enough, not buying it specifically for the battery life. It having the lowest battery life of the 4 tested doesn't matter as long as it meets his minimum requirement, considering none of the other laptops are taking framework's approach to design either.
I would not consider that an easily swappable battery, and while I might get a spare battery, I wouldn't casually change the battery since it requires opening the laptop up and unscrewing it.
Yeah - I'm a big framework fan but the battery is not easily swappable (if you define easily swappable as being able to do it without tools on the go between meetings). To me easily swappable is like that dell or the lenovos which had two batteries and the second one was hot-swappable.
While I still feel that swapping the Framework battery is easy, I completely agree with your comment and the preceding comment that it isn't "hot swappable" in any sense (nor swappable without opening the innards). My apologies for implying otherwise.