This is how even a seemingly small difference like starting with a 15 or a 16 in a single ability can add up staggeringly over the course of the game. I see very little benefit in limiting a decent starting array to a select few races.
I agree. That's probably why there's a quest in the game that allows you to increase any stat by one, even before you reach level 4 (or shortly after). In the long run, the differences between the races are minimal.
Sure, some races will be slightly better for certain professions due to combinations of appropriate stats and passive racial bonuses, but it's definitely not something you should worry about. What may seem like a big difference at the beginning will be completely negligible in the end.
But the funny thing is that according to Larian, the most played race is "human male". It seems that players value immersion and roleplay value more than min-maxing their stats.