I think I misplaced my post, the intent was to respond to someone arguing that automation would help the wealthy quell the poor. Any comments I make about robots apply to machinery in general.

To your question, it is easier to break a tank than to operate one. Anti-tank weapons are cheaper than tanks, and range down to well-timed Molotov cocktails [0].

[0] https://www.quora.com/How-can-a-Molotov-cocktail-destroy-a-t...