Traditional Culture Encyclopedia - Photography major - Why doesn't ps shift axis blur respond?

Why doesn't ps shift axis blur respond?

The strength of the blur tool is too low.

The strength of fuzzy tools is too low, which will lead to the failure of fuzzy tools. Looking at the brush parameters, the effect is more obvious when the intensity is adjusted to 100%.

The blur effect is ineffective for solid color targets, weak for images with simple and bright pictures, and best for images with obvious contrast and complex composition.