They're saying that the person above was misrepresenting average working hours by choosing the farming industry to make their comparison.

He’s not wrong, though hh. The claim made was true 150-175 years ago, but not 100.

if you go back another 100 years to 1824 then yes you have a truly awful system. The "infernal mills" of England were fed by cotton exported from Southern slave plantations. Most people took Sunday off but 12-hour days were common. This period was absolutely not seen as normal or acceptable by the people living through it and gave rise to massive social unrest as well as the socialist movement. It is immortalized in fictional works like "Oliver Twist" and "Les Miserables" which show widespread concern for the shocking plight of the urban poor at that time. By 1924 material conditions had improved vastly, industrial action and labor movements worldwide had won legal concessions, and 12-hour days were much more rare. Ford's 8-hour day was less than the average but not radically so.