Fruit flies can drink wine.

Doing maths - well, it is a common trope that we extrapolate skills of a fraction of humans on the entire population. For an average human 1/3 + 1/2 can be problematic.

Abstract counting up 5 or so - well, many birds can do that, including pigeons.

the wine part was a joke. especially because fruit flies definitely appear to be attracted to fruit, wine, etc

i believe you are underestimating how capable humans really are. all of us can learn to do math and i’m talking serious math not basic math.

My point from above is that 'humans playing tennis' isn't a great benchmark for the efficiency of our brains.