A lot of assumptions there. Why is delivery from the he vendor unprofessional and unreliable, compared to Amazon who hires anyone off the street as independent

A lot of assumptions there. Why is delivery from the he vendor unprofessional and unreliable, compared to Amazon who hires anyone off the street as independent contractors to handle deliveries? It's a very oligopolistic view to say only Amazon and a few big companies are trustworthy logistics providers.