For that matter, Americans in the '70s wouldn't have seen pink that way. I've seen episodes of '70s TV shows...
Australia got colour TV in 1975, about the same time as lilac bodyshirts hit the shops.
For that matter, when the custom of color-coded blue and pink baby clothes first came into use in the 1910s-20s, it was pink that was the boys' color
50s/60s it had become the total opposite. Amazing.
The really big pink-for-men resurgence in fashion I recall was Don Johnson's tops in "Miami Vice" in the 80s.