Here's why:

* Transform boundaries are where two tectonic plates slide past each other horizontally.

* No new crust is created, and no existing crust is destroyed at these boundaries.

* The plates simply grind against each other, causing earthquakes.

Examples of transform boundaries:

* The San Andreas Fault in California

* The Alpine Fault in New Zealand

In contrast:

* Convergent boundaries are where plates collide, causing one plate to subduct (slide) beneath the other, leading to crust destruction.

* Divergent boundaries are where plates pull apart, allowing magma to rise and create new crust.