Why longitudinal extraction with poorly anchored roots?

The root cross sections are usually oval and the alveolar walls break at the slightest rotation with the pliers.
The video clearly shows several longitudinal fractures from the extraction using pliers.

Only applying force solely along the longitudinal axis of the root during the extraction can fine remaining parts of the alveolar wall be preserved, as shown in the example below.



Status after a Benex longitudinal extraction:

It was possible to preserve the fine interdental bone bridge coronally and three months after the extraction there was a wide bony ridge.