[aveao]

Where I live we have labor rights and if your job is delivering mail and you're given a horse for it, you'd only be expected to deliver as much mail as you can in your contractual work time, which is then limited by the legal limits (8 hours/workday, up to 6 days/week). So you'd be home for most of the day, but delivering less letters per day.

(where I live a car would also be slower for delivering mail than a horse, most delivery people are given trikes, but alas)

This is how all industrialization/automation works in general: When you have a way to deliver faster/more, you're given more mail to deliver in your work time. Your pay does not go up, but any given road blockage or instance of traffic makes you fall behind quota significantly more. You're not paid by how many letters you deliver, but by the hours you work. Maybe you even make less as there's less overtime. Post will then proceed to simply employ less people over time as each employee is made to deliver more letters, then maybe you're part of the people whose jobs are cut. Or they might just reduce wages for everyone anyways, as now the job is much more accessible and there's more supply of labor than there is demand.

This is not an argument against industrialization or automation, but your perspective of what would happen if we had more industrialization is... very narrow.

We must consider the potential future where there's simply not enough work for most people to do (a realistic future now), and how we'll prevent that from going the same way it would currently go (losing income -> losing domicile -> starvation/freezing/etc).