Sorry but you sound like you were beamed down from the mothership yesterday and you got this info from an introductory pamphlet on planet earth :)
The issue isn't that people don't have agency, it's that when they use their agency to enact any actual meaningful changes they get beaten down mercilessly by people which much more wealth and power.
And that's exactly what was happening to workers in Henry Fords era, and it's what lead to an explosion of labour activism which was responded to with murderous brutality that is too well documented to recount in full detail here.
And the question here isn't whether people use their agency or not, or whose side you take or whatever, it's just whether educated onlookers can even talk honestly about it without going off in to flights of abstraction and fantasy.
Edit: added a smiley to clarify I am not trying to be mean, just communicate some level of incredulity about popular conceptions of labour history of the late 19th / early 20th century...