It might have been their only chance at an education or they were dirt poor and this was the only career available that didn’t involve dealing drugs.

That’s really a myth. Most of the military come from middle and upper middle classes, and those growing up in lower income households are underrepresented compared to the general population.

No we don’t, because it wasn’t approved in the US until the late 90s and only for treating VERY specific cancers.

It was pushed out in West Germany in the 50s specifically as a morning sickness med while pregnant, which is why these warnings are on there.