Why does god want to cut off women's hands?

[John V]

Absolutely incorrect. You implied that the reason the punishment has to be so disproportionately harsh

First, I have maintained that the punishment can be either harsher or lighter than the offense, depending on what damage was done.

is because that's what makes it effective as a deterrent.

A slap on the wrist isn't much of a deterrent.

It is therefore a valid question to ask, why stop there?

Which is the slippery slope fallacy.

Not even really a slippery slope, as God handed down death sentences for transgressions far less serious than gripping the testicles, such as working on the sabbath.

Why do you think a bunch of bronze age goatherder slave owners made a law prohibiting their servants and slaves from working every seventh day?

So, when he does things that aren't perfect and could easily be done better by non-gods, that's what, by choice?

You haven't demonstrated that non-gods could easily do better. You have an opinion. That's it. You can't objectively prove that your opinion is correct.