There's No Reason For That

We have five phalanges on each hand. Four of them are fingers, and one of them is an opposable thumb. The medical technicalities on physiology have their reasons for differentiating the lone thumb from the rest of the phalanges, but my rationale for it is that while the other four are referred to as a finger of some sort (Pointer/Middle/Ring/Pinky finger), the thumb is always referred to as a thumb, not a thumb finger.

Walk up to anyone on the street and ask how many fingers they have and see how many people talk about phalanges. I'm not saying there isn't some medical differentiation but the vast, vast majority of people on planet earth consider themselves to have ten fingers and ten toes

I'm merely giving a reason why medical science says why we have 8 fingers and 2 thumbs. I'm not polling the public for their opinion.

Bold of you to dismiss thumbs when your comment depends on them liking it