Dog
The dog demands what economists term comprehensive stakeholder management. Daily requirements include two to three walks regardless of weather, feeding on a schedule the dog will enforce through persistent reminder, grooming to prevent the accumulation of concerning biological matter, and the maintenance of social relationships with other dogs whose owners you would not otherwise encounter.
Beyond routine maintenance, dogs require contingency planning. Travel necessitates boarding arrangements. Illness demands veterinary intervention averaging hundreds of pounds per incident. The decision to sleep late requires negotiation with an entity that does not recognise the concept of compromise.
Espresso
The espresso machine, once installed and supplied, operates on demand. Beans require replenishment approximately weekly. The water reservoir accepts filling at user convenience. The machine itself requires periodic descaling, a task accomplished in under thirty minutes with commercially available solutions.
No espresso machine has ever required a midnight emergency visit to a 24-hour veterinary clinic. No espresso machine has developed anxiety requiring medication. No espresso machine has eaten the postman's hand.
VERDICT
The espresso machine asks only for beans, water, and occasional maintenance. The dog asks for restructuring your entire life around its requirements.