> The owner or the liquor store I worked at required the drivers to do a lot. Heavy lifting and placing product. They are defacto employees. Owner of a liquor chain has great pull. From simple product placement, sales, etc. Uber chose this market - but why a heavy perishable delivery.

You nailed it yourself. It's heavy, so hard for people to move (easier for machines). It's perishable, so it benefits greatly from more frequent smaller deliveries, instead of rare large deliveries. If you don't have to pay a person to drive, you can do that. Additionally, the packaging is perfectly regular (cans or kegs, always the same size, made of a durable material).

Someone parsed this correctly.