Who is "we"? I remember participating in the first Earth Day. You are correct, attitudes change but for some of us the attitude has never changed.
And we also threw our trash out the car windows littering the highways, used the ocean as the world's garbage dump etc. Back in the early 80's I took the glass bottom boat tour at John Pennekamp Park in the Florida Keys. The trip from the dock to deep water showed me just how stupid people are. The floor of the channel was littered with countless beer bottles, beer cans and other garbage and this was supposed to be a State Park. Things & attitudes change, some for the better & some for the worse until we learn it's doing harm.
As for just how protected Sea Turtles are I came very close to being arrested in St Augustine after rescuing a very small one at the tail end of a Tropical storm. I spotted it in some sea weed washed ashore & it was exhausted. I carried it out past the bad surf to see if it could swim on it's own but it couldn't so I caught it & took it back to the park. It would have been run over if left on the beach because people drive up & down it all day long, and one of those vehicles belongs to a Turtle Rescue program but it wasn't around at the time & we couldn't find their phone number. We phoned the Sheriff's Office to see who they recommended we call & I was IMMEDIATELY warned not to harm it or I'd be arrested & charged, and I was given the same attitude by the Rescue people over the phone, but once they arrived things improved attitude wise. They did however make it VERY CLEAR that had that baby been healthy rather than near death I could have been in serious trouble just for picking it up. They were able to nurse it back to healthy & it and some others were taken out placed in the Gulf Stream where they hopefully survived.