OptionalRule
Hyperion
I think think it's about impressions, it's about baselines. Once you have a standard, every character is going to be assessed as above or below that standard (or meet it). Most players do not want a character below the standard. However, using a system where variation is the norm, it becomes more acceptable.So the interesting thing here to me is: if you roll the way the PHB say to roll, you'll probably have a 16 to put in your best ability, before racial mods. Ergo, starting with a 16 regardless of race is well within the tested range of ability scores.
The conclusion I draw: elf barbarians starting with a 16 str is an intended result of default chargen, not an outlier. Standard array and point buy, not rolling, create the impression of 'needing' a race with the 'right' ASI to playa class.