All I see is some questions from you. Do you have some statement to make?

Is asking questions a worse form of dialogue to you? Is it intentionally ironic that you left only a snarky question yourself?

These questions are all posited from a modern, critical perspective, which is pointlessly fishing for theoreticals out of context.

If the experiment was via college students, it is unlikely that anyone thought about the experiment design much, because students. This may be true of any adults in that time and area, maybe, as a (unnoted) selection bias. There was an implicit cultural deference to authority in the 70s that doesnt exist now (the thinking of the counter culture was also very different). Finally, there was a weak understanding of what terminology (like subject) implied or the inherent dangers, much less the ethical perils.