Why isn’t our dominant hand’s bicep disproportionally larger than our non-dominant hand’s bicep?

Question

Considering we use our dominant arm for lifting, most tasks, holding things, etc.

In: Biology

Answer 1

Ye ol 4.20, 4 muscles in the upper arm and 20 in the forearm.  

We are rarely actually flexing the arm and holding weight in day to day life so bicep is not that overworked compared to the other.

All of our grabbing, squeezing, typing ect. Is done in the forearm and there’s a lot of good muscle to distribute tension and the muscle belly’s are much much smaller so even when strengthened regularly they done look as “bulked”