After all, those regular asteroids are what normal asteroids should be, while Vesta is an asteroid formed by the degradation of a regular planet after its destruction, so the two are naturally completely incomparable.
To put it more bluntly, Vesta's status, in some sense, is a case of a skinny camel being bigger than a horse, since it was once prosperous, even though its crust is gone, it is far superior to regular asteroids.
As for why Zhang Yanhang suddenly brought up these ordinary asteroids, it is because the fragments and debris from Vesta's destruction are rapidly tearing apart nearby asteroids and meteoroid belts.
These asteroids, averaging only tens of kilometers in size, naturally have no ability to resist these 'man-made meteorites,' as they are filled with immense kinetic energy caused by Zhang Yanhang, resulting in immediate fragmentation upon impact.
