Because you've got to include the man who grew the coffee, which was brewed for the man who was on the oil rig, who was drilling for oil, which was going to be made into the plastic, etc.
というのは コーヒーを栽培していた男 そのコーヒーを飲んだ石油採掘場で働いていた男 男が採掘した原油からプラスチックが作られ 等々