As a side-effect of the stat-boost feats, taking one of those feats at 1st level allows a variant human to start with a 14 in their prime stat, boost it +1 as one of their roaming human +1 bonuses, and add the extra +1 they get from the stat-boosting feat to reach a starting stat of 16 without using the expensive "9 points buys you a 15 stat" option. That saves 2 point-buy points to put elsewhere. That helps your character be more well-rounded to start out with.
My thought-experiment variant Druid is currently configured to take the Observant feat at 1st level for a feat-based +1 WIS. This lets him have final stats (in descending order) of 16, 14, 14, 12, 10, 10 -- which is fine start -- and it lets him start with passive Perception of 18 and passive Investigation of 16. That's a worthy way to start IMHO. He's not going to be a combat monster; but if I had wanted to make a combat monster, I would have gone Fighter instead of Druid.