As far as I know, the Thylacine was not hunted into extinction. Therefore, it is not the case that you could “bring it back” and just convince people not to hunt them, and then enjoy a world full of thriving Thylacines.
Rather, I think it is more accurate to say that the Thylacine could not compete in the world. The environment was not suitable, the food was not available, the conditions were not amenable. If you “bring them back” they are likely to go extinct again.
You could also try to bring back the Ford Pinto, but they just aren’t going to sell.
My first car was a Pinto.......................