Is there a risk for HDD being loosely packaged for transportation?

Look up the environmental specifications for this model of disk. Probably the non-operating shock tolerance will be decent, for a device that pushes known physics to encode tiny bits of information. A drop from 2 meters will probably be damaging on a hard surface, but the acceleration greatly depends on how the stop is cushioned by packaging. Bubble wrap can cushion quite well, even if the box is not a tight fit.

Drives are a point of failure already. Use them in an array that can tolerate a drive loss. Back up data to other storage media.

If you wish to complain to whomever shipped you those drives, take some measurements to support your hypothesis. Install shock sensors in the original packaging. Maybe actual drives, if doing returns or using spares. Do a drop test from a short height. Send it through the same delivery service. Should the acceleration exceed specifications, that would be concerning.