I hear ya, but you also have to take into account a lot of people, especially with newer cars with ELD's and all that dumb **** hardly charge IN the 14s, like the civic for example, it only charges over 14 when it senses that it needs it, AC being on, window being rolled down, etc..
And then we have people who actually do charge at 14.4 where most amps are rated, but do they see 14.4 consistently? Nope.. And if they have a system in their car with anything short of STOUT electrical, they won't ever see 14.4 hardly.
Then we have me, my DC xp keeps my sheit charged at 15.3 all day.
I guess what I'm trying to get across, is even if they rated the all amps at 14.4, you're still gonna have people either not getting rated or getting more out of it because of whatever they charge at, electrical, etc..