The height of a person has become a major consideration while hiring employees in the last few decades
Many short people, find it difficult to get good jobs, the income and opportunities they deserved because of the increasing prejudice and discrimination which the mainstream media does not cover.
So they are forced to do tedious and low paying jobs.
The courier and amazon delivery persons are short in height. The delivery work is fairly tedious, the delivery person has to spend a lot of time outdoors, visiting different places so many people are not interested in this work.