Straight or nearly straight stocks, are not ergonomic. Notice the military use pistol grips?

I have not fired a bolt operated rifle with pistol grips. But they do feel more comfortable. When shooting long periods even with the almost straight stocks we call pistol grips, can be hard on wrists. It is not a natural angle for our hands.

We don't drive cars with our wrist at some odd angle. We type on keyboards at pistol grip like angle too.

Wood stocks are left over from, carving stocks from wood.